fix(ci): verify the unified quant runtime

.gitea/workflows/ci.yml

@@ -16,6 +16,8 @@ permissions:
 jobs:
   lite:
     runs-on: ubuntu-latest
+    env:
+      UV_PYTHON_DOWNLOADS: never
     steps:
       - uses: actions/checkout@524e936cd9e579adf00e308bfdf971aebc7de09e
         with:
@@ -26,7 +28,18 @@ jobs:
           if git ls-files .DS_Store | grep -q .; then echo "跟踪 .DS_Store"; exit 1; fi
           if git grep -n -I -E 'sk-[A-Za-z0-9]{20,}|AKIA[0-9A-Z]{16}|ghp_[A-Za-z0-9]{36}|xox[baprs]-[A-Za-z0-9-]{10,}' HEAD | grep -q .; then echo "检出疑似凭证"; exit 1; fi
           echo "Gitea 合规校验通过"
+
+      - name: 验证并同步共享运行时
+        run: |
+          test "$(python3 --version)" = "Python 3.13.15"
+          test "$(uv --version | cut -d' ' -f1-2)" = "uv 0.12.3"
+          uv sync --locked --extra dev
+          uv run --locked --no-sync python -c 'import sys; assert sys.version_info[:2] == (3, 13)'
+
       - name: 架构模块契约测试
-        run: python3 tests/governance/test_module_spec.py
+        run: |
+          uv run --locked --no-sync python tests/governance/test_module_spec.py
+          uv run --locked --no-sync python tests/governance/test_ci_contract.py
+
       - name: Syntax check
-        run: git ls-files -z '*.py' | xargs -0 python3 -m py_compile
+        run: git ls-files -z '*.py' | xargs -0 uv run --locked --no-sync python -m py_compile

.python-version

@@ -0,0 +1 @@
+3.13

README.md

@@ -19,12 +19,10 @@
 ## 模块
 
 - `alpha_factors` — 158 alpha 公式 + 24 基础算子（移植自 qlib alpha158）
-- `execution` — A 股长仓执行仿真（成本/滑点/现金约束）+ 稀疏调仓/完整交易日 Ledger + 可投影成交与 NAV 审计；T+1、涨跌停、成交量与价差提供独立约束函数
+- `execution` — 执行仿真（成本/滑点/T+1/涨跌停/部分成交/价差）+ 多日 NAV + PnL 拆解（借鉴 hikyuu 部件化思想）
 - `indicators` — 50+ 技术指标（MACD / KDJ / 布林 / ATR / ADX / 等）
 - `data_adapter` — 桥接 qtdb_pro 长表与新模块（rename / long-wide / 复权 / vwap 代理）
 - `backtest` — weight-based 多日仿真（rebalance_table / compute_nav / compare_to_benchmark）
-- `portfolio_construction` — 多期因子分数 → Top-K → 等权目标权重表
-- `research_pipeline` — 因子日 → 下一真实交易日 → 显式执行价 → 日末估值 → 成本后绩效（防前视编排）
 - `metrics` — 绩效（年化收益 / 波动率 / Sharpe / 最大回撤 / Calmar）
 - `factor_library` — 通用方法（turnover / winsorize / IC / OLS / jb_test）
 - `portfolio_decomp` — 组合分解（risk_parity / mean_variance / 因子归因）
@@ -60,13 +58,8 @@ ruff check src/ tests/    # lint
 ```python
 from quant_engine.alpha_factors import alpha_001, alpha_005, ALPHA158_REGISTRY
 from quant_engine.execution import (
-    ExecutionConfig, simulate_daily_ledger_with_audit,
-    simulate_multi_day_with_audit, simulate_with_daily_data,
+    ExecutionConfig, simulate_with_daily_data, compute_realized_pnl,
 )
-from quant_engine.research_pipeline import (
-    run_factor_backtest_research, run_factor_execution_research,
-)
-from quant_engine.backtest import run_weight_backtest
 from quant_engine.indicators import macd, bollinger, kdj
 from quant_engine.data_adapter import (
     long_to_wide, wide_to_long, rename_tushare_columns,
@@ -77,65 +70,8 @@ from quant_engine.data_adapter import (
 
 # 端到端：qtdb_pro 长表 → 适配 → alpha158 → execution
 df = load_qtdb_daily(["000001.SZ"], "2024-01-01", with_adj=True)
-close_prices, volumes = prepare_execution_inputs(df)
-open_prices, _ = prepare_execution_inputs(df, price_col="open")
-result = simulate_with_daily_data(close_prices, initial_cash=1_000_000.0)
-
-# 已正确滞后的目标权重 → 现金约束执行 → 唯一来源的成交/拒绝/日末持仓/NAV
-execution = simulate_multi_day_with_audit(
-    target_weights_history=[
-        ("2024-01-02", {"000001.SZ": 1.0}),
-        ("2024-01-03", {"000001.SZ": 1.0}),
-    ],
-    price_history=[
-        ("2024-01-02", {"000001.SZ": 10.0}),
-        ("2024-01-03", {"000001.SZ": 10.5}),
-    ],
-    initial_cash=1_000_000.0,
-    config=ExecutionConfig(),
-)
-print(execution.nav_series)
-print(execution.daily_executions)
-
-# 多期因子分数（必须是 point-in-time 数据）→ Top-K → 下一交易日 open 执行
-factor_execution = run_factor_execution_research(
-    factor_scores,
-    top_k=20,
-    execution_prices=open_prices,
-    execution_price_field="open",
-    initial_cash=1_000_000.0,
-)
-
-# 推荐研究入口：同一交易日历上显式区分 open 成交和 close 估值。
-# 因子日保持现金，下一交易日成交后的真实持仓才参与当日收盘收益。
-factor_backtest = run_factor_backtest_research(
-    factor_scores,
-    top_k=20,
-    execution_prices=open_prices,
-    valuation_prices=close_prices,
-    execution_price_field="open",
-    valuation_price_field="close",
-    initial_cash=1_000_000.0,
-    config=ExecutionConfig(),
-)
-print(factor_backtest.nav)
-print(factor_backtest.returns)
-print(factor_backtest.stats())
-print(factor_backtest.execution.ledger_frame)
-print(factor_backtest.execution.trades_frame)
-
-# run_weight_backtest 是低层算子：只接受收益区间开始前已经生效的持仓权重。
-# 不要把 signal-date 的 factor_scores/decision_weights 直接传给它。
-backtest = run_weight_backtest(
-    weights=effective_holding_weights,
-    stock_returns=daily_returns,
-    initial_capital=1_000_000.0,
-    benchmark_nav=benchmark_nav,
-)
-print(factor_execution.schedule.signal_to_execution)
-print(factor_execution.execution.daily_executions)
-print(backtest.stats())
-print(backtest.benchmark_report())
+prices, volumes = prepare_execution_inputs(df)
+result = simulate_with_daily_data(prices, initial_cash=1_000_000.0)
 ```
 
 ## 与 research_results 的关系

ci-profile.yml

@@ -0,0 +1,9 @@
+profile: lite
+runtime_contract: v1
+language: python
+python_version: "3.13"
+python_manager: uv
+python_root: "."
+local_test_command: "python3 tests/governance/test_module_spec.py"
+requires_database: false
+integration_profile: none

docs/handoff/2026-08-21-post-execution-ledger.md

@@ -1,33 +0,0 @@
-# Post-execution daily Ledger handoff
-
-## 状态
-
-- 分支：`codex/post-execution-ledger-20260821`
-- 基线：`codex/core-contracts-20260821`（PR #2，尚未获用户确认合并）
-- 本分支不得直接合并到 `main`；先等待 PR #2 合并，再整理基线并创建独立 PR。
-- 无账户、券商、数据库或实盘副作用。
-
-## 已完成
-
-- 新增稀疏调仓、完整交易日估值的 `simulate_daily_ledger_with_audit()`。
-- 显式分离 execution price 与 valuation price，支持下一日 open 成交、当日 close 估值。
-- 成交记录补齐 `side / quantity / price`，并提供 `trades_frame`。
-- 提供平台中立的 `ledger_frame`，不携带 `run_id`，不写数据库。
-- 新增 `run_factor_backtest_research()`：PIT 因子、下一交易日执行、日频 NAV、首日成本收益和标准绩效。
-- 研究区间从首条有效信号日开始，排除因子预热行情对绩效的稀释。
-
-## 验证
-
-- `pytest -q --cov=src --cov-report=term-missing`：500 passed，total coverage 91%。
-- `mypy --strict src/`：14 source files passed。
-- 本阶段文件 scoped Ruff：passed。
-- 全仓 Ruff：仅既有 governance tests 的 13 个 PT009 基线问题。
-- workspace verify/status：通过；仅提示功能分支不是引导基线 `main`。
-- 全局 Gitea workflow check：通过，23 个既有警告。
-
-## 继续步骤
-
-1. 获得用户对 PR #2 的明确合并确认并按 L2 流程合并。
-2. 将本分支整理到更新后的 `main`，重新运行相同全量验证。
-3. 为 Ledger 阶段创建独立 PR，执行唯一一次最终 `ship --ready`，等待用户确认合并。
-4. 后续在 `research_results` 增加业务投影适配器，再由 `research_platform` 持久化和展示；核心层继续保持无数据库写入。

pyproject.toml

@@ -7,7 +7,7 @@ name = "quant_engine"
 version = "0.1.0"
 description = "量化研究引擎 —— alpha 因子库 + 执行仿真 + 技术指标 + 数据适配 + 回测工具（v1.2.0 从 research_results 抽出）"
 readme = "README.md"
-requires-python = ">=3.11"
+requires-python = ">=3.13,<3.14"
 license = { text = "MIT" }
 authors = [
     { name = "researchhub team" },
@@ -39,7 +39,7 @@ where = ["src"]
 
 [tool.ruff]
 line-length = 100
-target-version = "py311"
+target-version = "py313"
 
 [tool.ruff.lint]
 select = ["E", "F", "W", "I", "N", "UP", "B", "A", "C4", "PT", "RUF"]
@@ -54,10 +54,13 @@ ignore = [
 ]
 
 [tool.mypy]
-python_version = "3.11"
+python_version = "3.13"
 strict = true
 ignore_missing_imports = true
 
+[tool.uv]
+index-url = "https://mirrors.cloud.tencent.com/pypi/simple"
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 addopts = "-v --tb=short"

src/quant_engine/backtest.py

@@ -13,28 +13,29 @@
 
 ```python
 from quant_engine.backtest import (
-    rebalance_periodic,           # 周期性再平衡
-    run_weight_backtest,          # 权重 → 统一结果对象
+    compute_nav_from_weights,    # 调仓表 → 净值
+    rebalance_table,              # 周期性再平衡
+    compare_to_benchmark,         # 策略 vs 基准
     weights_to_long_short,        # 多空组合
 )
 
-# 调仓表 → 净值、收益、绩效与基准报告
-rebalance_table = rebalance_periodic(target_weights, rebalance_dates, returns.index)
-result = run_weight_backtest(
+# 1. 调仓表 → 净值
+nav = compute_nav_from_weights(
     weights=rebalance_table,    # 每周/每月调仓
     stock_returns=returns,      # 个股日收益
     initial_capital=1.0,
-    benchmark_nav=benchmark_nav,
 )
-print(result.stats())
-print(result.benchmark_report())
+
+# 2. 跟基准比
+result = compare_to_benchmark(nav, benchmark_nav)
+print(result.summary())
 ```
 """
 
 from __future__ import annotations
 
+from pathlib import Path
 from collections.abc import Mapping, Sequence
-from dataclasses import dataclass
 
 import numpy as np
 import pandas as pd
@@ -45,26 +46,6 @@ from quant_engine.metrics import summary as metrics_summary
 logger = get_logger(__name__)
 
 
-@dataclass(frozen=True, slots=True, eq=False)
-class BacktestResult:
-    """一次权重回测的稳定结果快照。"""
-
-    nav: pd.Series
-    returns: pd.Series
-    weights: pd.DataFrame
-    benchmark_nav: pd.Series | None = None
-
-    def stats(self, rf: float = 0.0) -> Mapping[str, float]:
-        """返回标准绩效指标。"""
-        return metrics_summary(self.returns, rf)
-
-    def benchmark_report(self, rf: float = 0.0) -> pd.DataFrame:
-        """返回策略与基准的对比报告。"""
-        if self.benchmark_nav is None:
-            raise ValueError("benchmark_nav is required for benchmark comparison")
-        return compare_to_benchmark(self.nav, self.benchmark_nav, rf)
-
-
 # ── 调仓表 → 净值 ──────────────────────────────────────
 
 
@@ -76,9 +57,8 @@ def compute_nav_from_weights(
 ) -> pd.Series:
     """从调仓表（日期 × 股票权重）+ 个股日收益 → 净值曲线。
 
-    假设：输入是该收益测量区间开始前已经生效的持仓权重，并在调仓日之间
-    保持不变（**前向填充**）。本函数不会把信号日自动解释为执行日；因子分数
-    应先经交易日历调度和实际执行时点处理，避免把同一时点未知的收益计入。
+    假设：在调仓日之间权重不变（**前向填充**）。
+    调仓日的权重 = `weights.loc[rebalance_date]`。
 
     Args:
         weights: 调仓日 × 股票代码 的权重 DataFrame（**0~1**，行和 ≤ 1）
@@ -133,29 +113,6 @@ def compute_returns_from_nav(nav: pd.Series) -> pd.Series:
     return nav.pct_change().fillna(0.0)
 
 
-def run_weight_backtest(
-    weights: pd.DataFrame,
-    stock_returns: pd.DataFrame,
-    initial_capital: float = 1.0,
-    tc_rate: float = 0.0,
-    benchmark_nav: pd.Series | None = None,
-) -> BacktestResult:
-    """执行权重回测并返回隔离于调用方输入的结果快照。"""
-    weights_snapshot = weights.copy(deep=True)
-    nav = compute_nav_from_weights(
-        weights=weights_snapshot,
-        stock_returns=stock_returns,
-        initial_capital=initial_capital,
-        tc_rate=tc_rate,
-    )
-    return BacktestResult(
-        nav=nav,
-        returns=compute_returns_from_nav(nav),
-        weights=weights_snapshot,
-        benchmark_nav=None if benchmark_nav is None else benchmark_nav.copy(deep=True),
-    )
-
-
 # ── 调仓工具 ──────────────────────────────────────
 
 
@@ -174,9 +131,6 @@ def rebalance_periodic(
     Returns:
         调仓表 DataFrame（all_dates × 股票代码）
     """
-    if all_dates.empty:
-        return pd.DataFrame(index=all_dates, columns=target_weights.index, dtype=float)
-
     table = pd.DataFrame(0.0, index=all_dates, columns=target_weights.index)
     for date in rebalance_dates:
         if date not in all_dates:
@@ -247,8 +201,6 @@ def compare_to_benchmark(
     """
     # 对齐 index
     common = strategy_nav.index.intersection(benchmark_nav.index)
-    if common.empty:
-        raise ValueError("strategy and benchmark must have overlapping dates")
     s = strategy_nav.loc[common]
     b = benchmark_nav.loc[common]
 

src/quant_engine/data_adapter.py

@@ -287,8 +287,6 @@ def prepare_execution_inputs(
     df: pd.DataFrame,
     stock_col: str = "stock_code",
     date_col: str = "trade_date",
-    *,
-    price_col: str = "close",
 ) -> tuple[pd.DataFrame, pd.DataFrame]:
     """长表行情 → execution 输入（prices + volumes 宽表）。
 
@@ -296,11 +294,10 @@ def prepare_execution_inputs(
         df: 长表行情（含 close / volume 列，Tushare rename 后）
         stock_col: 股票代码列名
         date_col: 日期列名
-        price_col: 执行价字段，默认 close；防前视研究可显式选择下一交易日 open
 
     Returns:
         (prices_wide, volumes_wide)：
-        - prices_wide: date × stock_code，值=price_col
+        - prices_wide: date × stock_code，值=close
         - volumes_wide: date × stock_code，值=volume（若无 volume 列则全 1.0）
 
     Examples:
@@ -316,9 +313,9 @@ def prepare_execution_inputs(
     """
     if df.empty:
         return pd.DataFrame(), pd.DataFrame()
-    if price_col not in df.columns:
-        raise ValueError(f"prepare_execution_inputs: 缺 {price_col} 列，实际列={list(df.columns)}")
-    prices = long_to_wide(df, value_col=price_col, date_col=date_col, stock_col=stock_col)
+    if "close" not in df.columns:
+        raise ValueError(f"prepare_execution_inputs: 缺 close 列，实际列={list(df.columns)}")
+    prices = long_to_wide(df, value_col="close", date_col=date_col, stock_col=stock_col)
     if "volume" in df.columns:
         volumes = long_to_wide(df, value_col="volume", date_col=date_col, stock_col=stock_col)
     else:

src/quant_engine/execution.py

@@ -10,9 +10,7 @@
 借鉴 hikyuu SG/MM/CN/PG 部件化思想（不引入 hikyuu 框架）：
 - ExecutionConfig：佣金 + 印花税 + 滑点 + 最小交易额 + 止损/止盈阈值
 - simulate_execution()：从目标权重 → 实际成交金额（应用成本/滑点）
-- simulate_daily_ledger_with_audit()：稀疏调仓 + 完整交易日收盘估值 Ledger
-- simulate_multi_day_with_audit()：目标权重差额调仓（成交/拒绝/持仓/NAV）
-- simulate_multi_day()：兼容的多日日末持仓快照入口
+- simulate_multi_day()：多日组合仿真（NAV 序列 + 调仓记录）
 - check_stop_loss_take_profit()：止损/止盈触发判定
 - run_end_to_end_poc()：signal → 调仓 → 执行 → NAV 端到端 POC
 
@@ -21,9 +19,8 @@
 
 from __future__ import annotations
 
-import math
 from collections.abc import Mapping
-from dataclasses import dataclass, replace
+from dataclasses import dataclass
 from typing import Any
 
 import pandas as pd
@@ -104,9 +101,6 @@ class ExecutionResult:
     net_cash_flow: float  # 净现金流（买入为负，卖出为正）
     partial_fill_pct: float = 1.0  # 实际成交占目标的比例（1.0 = 全部成交）
     blocked_reason: str = ""  # 阻塞原因（如涨跌停停牌）
-    side: str = ""  # buy / sell；未成交记录也保留目标方向
-    quantity: float = 0.0  # 实际成交股数
-    price: float = 0.0  # 未含滑点的参考执行价
 
 
 def _apply_costs(
@@ -350,505 +344,118 @@ class DailyExecution:
     """单日执行记录。"""
 
     date: str
-    executions: tuple[ExecutionResult, ...]
+    executions: list[ExecutionResult]
     nav_before: float
     nav_after: float
     rebalance_triggered: bool
 
 
-@dataclass(frozen=True)
-class ExecutionSimulationResult:
-    """单次多日仿真的持仓与执行审计结果。"""
-
-    initial_cash: float
-    positions: tuple[DailyPosition, ...]
-    daily_executions: tuple[DailyExecution, ...]
-
-    @property
-    def nav_series(self) -> pd.Series:
-        """返回按日期索引的日末 NAV 副本。"""
-        return pd.Series(
-            [position.portfolio_value for position in self.positions],
-            index=[position.date for position in self.positions],
-            dtype=float,
-        )
-
-    @property
-    def normalized_nav_series(self) -> pd.Series:
-        """返回以初始资金为 1 的净值曲线副本。"""
-        nav = self.nav_series
-        if self.initial_cash == 0:
-            return pd.Series(0.0, index=nav.index, dtype=float)
-        return nav / self.initial_cash
-
-    @property
-    def daily_returns(self) -> pd.Series:
-        """返回逐日收益；首日相对初始资金计算，保留首日交易成本。"""
-        nav = self.nav_series
-        if nav.empty:
-            return nav
-        returns = nav.pct_change()
-        returns.iloc[0] = (
-            nav.iloc[0] / self.initial_cash - 1.0 if self.initial_cash != 0 else 0.0
-        )
-        return returns.fillna(0.0)
-
-    @property
-    def trades_frame(self) -> pd.DataFrame:
-        """返回可投影到平台成交明细的实际成交表，不包含纯拒绝记录。"""
-        columns = [
-            "trade_date",
-            "ts_code",
-            "side",
-            "qty",
-            "price",
-            "amount",
-            "fee",
-            "slippage",
-        ]
-        rows = [
-            {
-                "trade_date": daily.date,
-                "ts_code": execution.stock_code,
-                "side": execution.side,
-                "qty": execution.quantity,
-                "price": execution.price,
-                "amount": execution.executed_value,
-                "fee": execution.commission + execution.stamp_tax,
-                "slippage": execution.slippage_cost,
-            }
-            for daily in self.daily_executions
-            for execution in daily.executions
-            if execution.quantity > 0
-        ]
-        return pd.DataFrame(rows, columns=columns)
-
-    @property
-    def ledger_frame(self) -> pd.DataFrame:
-        """返回稳定的日频 Ledger 投影，不附加运行元数据或写数据库。"""
-        columns = [
-            "trade_date",
-            "portfolio_value",
-            "nav",
-            "pnl",
-            "pnl_pct",
-            "position_value",
-            "cash",
-            "turnover",
-        ]
-        previous_value = self.initial_cash
-        rows: list[dict[str, float | str]] = []
-        daily_returns = self.daily_returns
-        for index, (position, daily) in enumerate(
-            zip(self.positions, self.daily_executions, strict=True)
-        ):
-            daily_turnover = sum(
-                execution.executed_value
-                for execution in daily.executions
-                if execution.quantity > 0
-            )
-            turnover_rate = daily_turnover / daily.nav_before if daily.nav_before > 0 else 0.0
-            rows.append(
-                {
-                    "trade_date": position.date,
-                    "portfolio_value": position.portfolio_value,
-                    "nav": (
-                        position.portfolio_value / self.initial_cash
-                        if self.initial_cash != 0
-                        else 0.0
-                    ),
-                    "pnl": position.portfolio_value - previous_value,
-                    "pnl_pct": float(daily_returns.iloc[index]),
-                    "position_value": position.portfolio_value - position.cash,
-                    "cash": position.cash,
-                    "turnover": turnover_rate,
-                }
-            )
-            previous_value = position.portfolio_value
-        return pd.DataFrame(rows, columns=columns)
-
-    @property
-    def total_costs(self) -> float:
-        """汇总实际成交产生的成本。"""
-        return sum(
-            execution.total_cost
-            for daily in self.daily_executions
-            for execution in daily.executions
-        )
-
-    @property
-    def total_turnover(self) -> float:
-        """汇总实际成交金额。"""
-        return sum(
-            execution.executed_value
-            for daily in self.daily_executions
-            for execution in daily.executions
-        )
-
-    @property
-    def total_rebalances(self) -> int:
-        """返回至少有一笔实际成交的调仓日数量。"""
-        return sum(daily.rebalance_triggered for daily in self.daily_executions)
-
-    @property
-    def final_portfolio_value(self) -> float:
-        """返回最后一个日末 NAV；空输入时返回初始资金。"""
-        if not self.positions:
-            return self.initial_cash
-        return self.positions[-1].portfolio_value
-
-    @property
-    def return_pct(self) -> float:
-        """返回相对初始资金的百分比收益。"""
-        if self.initial_cash == 0:
-            return 0.0
-        return (self.final_portfolio_value / self.initial_cash - 1.0) * 100.0
-
-
-def _blocked_execution(stock_code: str, target_value: float, reason: str) -> ExecutionResult:
-    """构造未成交但可审计的执行记录。"""
-    return ExecutionResult(
-        stock_code=stock_code,
-        target_value=target_value,
-        executed_value=0.0,
-        commission=0.0,
-        stamp_tax=0.0,
-        slippage_cost=0.0,
-        total_cost=0.0,
-        net_cash_flow=0.0,
-        partial_fill_pct=0.0,
-        blocked_reason=reason,
-        side="buy" if target_value > 0 else "sell" if target_value < 0 else "",
-    )
-
-
-def _validate_target_weights(date: str, targets: Mapping[str, float]) -> dict[str, float]:
-    """校验并复制单日长仓目标权重。"""
-    normalized: dict[str, float] = {}
-    for stock_code, raw_weight in targets.items():
-        try:
-            weight = float(raw_weight)
-        except (TypeError, ValueError) as error:
-            raise ValueError(f"target weights on {date!r} must be numeric") from error
-        if not math.isfinite(weight) or weight < 0:
-            raise ValueError(f"target weights on {date!r} must be finite and non-negative")
-        normalized[stock_code] = weight
-    if sum(normalized.values()) > 1.0 + 1e-12:
-        raise ValueError(f"target weights on {date!r} must sum to at most 1.0")
-    return normalized
-
-
-def _partially_fill_buy(
-    desired: ExecutionResult,
-    fill_pct: float,
-    config: ExecutionConfig,
-) -> ExecutionResult:
-    """按同一比例缩放买入，保留原始目标金额供审计。"""
-    actual_target_value = desired.target_value * fill_pct
-    executed_value, commission, stamp_tax, slippage_cost = _apply_costs(
-        actual_target_value,
-        True,
-        config,
-    )
-    total_cost = commission + stamp_tax + slippage_cost
-    return ExecutionResult(
-        stock_code=desired.stock_code,
-        target_value=desired.target_value,
-        executed_value=executed_value,
-        commission=commission,
-        stamp_tax=stamp_tax,
-        slippage_cost=slippage_cost,
-        total_cost=total_cost,
-        net_cash_flow=-(executed_value + commission + stamp_tax),
-        partial_fill_pct=fill_pct,
-        blocked_reason="insufficient_cash_partial_fill",
-    )
-
-
-def _rebalance_at_prices(
-    date: str,
-    targets: Mapping[str, float],
-    prices: Mapping[str, float],
-    cash: float,
-    holdings: dict[str, float],
-    config: ExecutionConfig,
-) -> tuple[float, tuple[ExecutionResult, ...], float, float]:
-    """在单一执行时点按目标权重差额调仓，并原地更新 holdings。"""
-    normalized_targets = _validate_target_weights(date, targets)
-    for held_code in holdings:
-        held_price = prices.get(held_code)
-        if held_price is None or not math.isfinite(held_price) or held_price <= 0:
-            raise ValueError(f"missing price for held asset {held_code} on {date!r}")
-
-    nav_before = cash + sum(
-        shares * prices.get(stock_code, 0.0)
-        for stock_code, shares in holdings.items()
-    )
-    effective_targets = dict.fromkeys(holdings, 0.0)
-    effective_targets.update(normalized_targets)
-    buy_weights: dict[str, float] = {}
-    sell_weights: dict[str, float] = {}
-    rejected: list[ExecutionResult] = []
-
-    for stock_code, target_weight in effective_targets.items():
-        price = prices.get(stock_code)
-        target_value = float(target_weight) * nav_before
-        if price is None or not math.isfinite(price) or price <= 0:
-            if target_value != 0 or holdings.get(stock_code, 0.0) != 0:
-                rejected.append(_blocked_execution(stock_code, target_value, "missing_price"))
-            continue
-
-        current_value = holdings.get(stock_code, 0.0) * price
-        trade_value = target_value - current_value
-        if abs(trade_value) < config.min_trade_amount or math.isclose(
-            trade_value, 0.0, abs_tol=1e-12
-        ):
-            continue
-        if nav_before == 0:
-            rejected.append(_blocked_execution(stock_code, trade_value, "zero_nav"))
-            continue
-        destination = buy_weights if trade_value > 0 else sell_weights
-        destination[stock_code] = trade_value / nav_before
-
-    sell_executions = simulate_execution(sell_weights, nav_before, config)
-    filled: list[ExecutionResult] = []
-    for raw_execution in sell_executions:
-        price = prices[raw_execution.stock_code]
-        quantity = abs(raw_execution.target_value) / price
-        execution = replace(
-            raw_execution,
-            side="sell",
-            quantity=quantity,
-            price=price,
-        )
-        held = holdings.get(execution.stock_code, 0.0)
-        holdings[execution.stock_code] = max(0.0, held - quantity)
-        if holdings[execution.stock_code] < 1e-6:
-            del holdings[execution.stock_code]
-        cash += execution.net_cash_flow
-        filled.append(execution)
-
-    desired_buys = simulate_execution(buy_weights, nav_before, config)
-    required_cash = sum(-execution.net_cash_flow for execution in desired_buys)
-    buy_fill_pct = min(1.0, max(cash, 0.0) / required_cash) if required_cash > 0 else 1.0
-    for desired in desired_buys:
-        if buy_fill_pct == 0:
-            rejected.append(
-                _blocked_execution(desired.stock_code, desired.target_value, "insufficient_cash")
-            )
-            continue
-        raw_execution = (
-            desired
-            if buy_fill_pct == 1.0
-            else _partially_fill_buy(desired, buy_fill_pct, config)
-        )
-        price = prices[raw_execution.stock_code]
-        quantity = abs(raw_execution.target_value) * raw_execution.partial_fill_pct / price
-        execution = replace(
-            raw_execution,
-            side="buy",
-            quantity=quantity,
-            price=price,
-        )
-        holdings[execution.stock_code] = holdings.get(execution.stock_code, 0.0) + quantity
-        cash += execution.net_cash_flow
-        if math.isclose(cash, 0.0, abs_tol=1e-9):
-            cash = 0.0
-        filled.append(execution)
-
-    executions = (*filled, *rejected)
-    nav_after = cash + sum(
-        shares * prices.get(stock_code, 0.0)
-        for stock_code, shares in holdings.items()
-    )
-    return cash, executions, nav_before, nav_after
-
-
-def _validate_sparse_daily_histories(
-    target_weights_history: list[tuple[str, dict[str, float]]],
-    execution_price_history: list[tuple[str, dict[str, float]]],
-    valuation_price_history: list[tuple[str, dict[str, float]]],
-) -> tuple[
-    dict[str, dict[str, float]],
-    dict[str, dict[str, float]],
-    list[tuple[str, dict[str, float]]],
-]:
-    """校验稀疏调仓与完整估值日历，并隔离调用方可变输入。"""
-    target_dates = [date for date, _ in target_weights_history]
-    execution_dates = [date for date, _ in execution_price_history]
-    valuation_dates = [date for date, _ in valuation_price_history]
-    if len(set(target_dates)) != len(target_dates):
-        raise ValueError("target_weights_history must contain unique dates")
-    if len(set(execution_dates)) != len(execution_dates):
-        raise ValueError("execution_price_history must contain unique dates")
-    if len(set(valuation_dates)) != len(valuation_dates):
-        raise ValueError("valuation_price_history must contain unique dates")
-    if execution_dates != target_dates:
-        raise ValueError("execution price dates must exactly match target weight dates")
-
-    valuation_positions = {date: index for index, date in enumerate(valuation_dates)}
-    missing_dates = [date for date in target_dates if date not in valuation_positions]
-    if missing_dates:
-        raise ValueError(f"target dates must belong to valuation calendar: {missing_dates}")
-    positions = [valuation_positions[date] for date in target_dates]
-    if positions != sorted(positions):
-        raise ValueError("target weights must follow valuation calendar order")
-
-    targets = {date: dict(values) for date, values in target_weights_history}
-    execution_prices = {date: dict(values) for date, values in execution_price_history}
-    valuation_prices = [(date, dict(values)) for date, values in valuation_price_history]
-    return targets, execution_prices, valuation_prices
-
-
-def _simulate_daily_ledger(
-    target_weights_history: list[tuple[str, dict[str, float]]],
-    execution_price_history: list[tuple[str, dict[str, float]]],
-    valuation_price_history: list[tuple[str, dict[str, float]]],
-    initial_cash: float,
-    config: ExecutionConfig,
-) -> ExecutionSimulationResult:
-    targets_by_date, execution_prices_by_date, valuation_history = (
-        _validate_sparse_daily_histories(
-            target_weights_history,
-            execution_price_history,
-            valuation_price_history,
-        )
-    )
-    cash = initial_cash
-    holdings: dict[str, float] = {}
-    positions: list[DailyPosition] = []
-    daily_executions: list[DailyExecution] = []
-
-    for date, valuation_prices in valuation_history:
-        targets = targets_by_date.get(date)
-        if targets is None:
-            executions: tuple[ExecutionResult, ...] = ()
-            nav_before = 0.0
-            nav_after = 0.0
-            rebalance_triggered = False
-        else:
-            cash, executions, nav_before, nav_after = _rebalance_at_prices(
-                date,
-                targets,
-                execution_prices_by_date[date],
-                cash,
-                holdings,
-                config,
-            )
-            rebalance_triggered = any(execution.quantity > 0 for execution in executions)
-
-        for held_code in holdings:
-            valuation_price = valuation_prices.get(held_code)
-            if (
-                valuation_price is None
-                or not math.isfinite(valuation_price)
-                or valuation_price <= 0
-            ):
-                raise ValueError(
-                    f"missing valuation price for held asset {held_code} on {date!r}"
-                )
-        portfolio_value = cash + sum(
-            shares * valuation_prices[stock_code]
-            for stock_code, shares in holdings.items()
-        )
-        if targets is None:
-            nav_before = portfolio_value
-            nav_after = portfolio_value
-        positions.append(DailyPosition(date, cash, dict(holdings), portfolio_value))
-        daily_executions.append(
-            DailyExecution(
-                date=date,
-                executions=executions,
-                nav_before=nav_before,
-                nav_after=nav_after,
-                rebalance_triggered=rebalance_triggered,
-            )
-        )
-
-    return ExecutionSimulationResult(
-        initial_cash=initial_cash,
-        positions=tuple(positions),
-        daily_executions=tuple(daily_executions),
-    )
-
-
-def simulate_daily_ledger_with_audit(
-    target_weights_history: list[tuple[str, dict[str, float]]],
-    execution_price_history: list[tuple[str, dict[str, float]]],
-    valuation_price_history: list[tuple[str, dict[str, float]]],
-    initial_cash: float,
-    config: ExecutionConfig | None = None,
-) -> ExecutionSimulationResult:
-    """以稀疏调仓和完整日历运行成交后持仓 Ledger。
-
-    执行价只用于调仓日现金与股数变化，估值价用于每个交易日日末 NAV；二者
-    显式分离，从而支持“下一日 open 成交、同日 close 估值”的无前视研究。
-    """
-    if not math.isfinite(initial_cash) or initial_cash <= 0:
-        raise ValueError(f"initial_cash must be positive and finite, got {initial_cash}")
-    return _simulate_daily_ledger(
-        target_weights_history,
-        execution_price_history,
-        valuation_price_history,
-        initial_cash,
-        ExecutionConfig() if config is None else config,
-    )
-
-
-def simulate_multi_day_with_audit(
-    target_weights_history: list[tuple[str, dict[str, float]]],
-    price_history: list[tuple[str, dict[str, float]]],
-    initial_cash: float,
-    config: ExecutionConfig | None = None,
-) -> ExecutionSimulationResult:
-    """按目标权重差额推进组合，并返回唯一事实来源的审计结果。
-
-    Args:
-        target_weights_history: [(date, {stock_code: target_weight})]
-        price_history: [(date, {stock_code: close_price})]，与 target_weights 同长度、同 date
-        initial_cash: 初始资金（元）
-        config: 执行配置
-
-    Returns:
-        日末持仓快照与逐日成交记录组成的结构化审计结果。
-
-    Note:
-        - 调仓频率 = target_weights_history 的频率（每日 / 每周 / 每月都行）
-        - 每日先按当日 close 估值，再交易“目标市值 - 当前市值”的差额
-        - 此处简化为当日 close 成交；调用方必须传入已正确滞后的目标权重
-    """
-    if not math.isfinite(initial_cash) or initial_cash < 0:
-        raise ValueError(f"initial_cash must be finite and non-negative, got {initial_cash}")
-    if len(target_weights_history) != len(price_history):
-        raise ValueError("target_weights_history and price_history must have same length")
-    for (date, _), (price_date, _) in zip(target_weights_history, price_history, strict=True):
-        if date != price_date:
-            raise ValueError(
-                f"target and price dates must match, got {date!r} and {price_date!r}"
-            )
-    return _simulate_daily_ledger(
-        target_weights_history,
-        price_history,
-        price_history,
-        initial_cash,
-        ExecutionConfig() if config is None else config,
-    )
-
-
 def simulate_multi_day(
     target_weights_history: list[tuple[str, dict[str, float]]],
     price_history: list[tuple[str, dict[str, float]]],
     initial_cash: float,
     config: ExecutionConfig | None = None,
 ) -> list[DailyPosition]:
-    """兼容入口：返回多日仿真的日末持仓快照。"""
-    result = simulate_multi_day_with_audit(
-        target_weights_history,
-        price_history,
-        initial_cash,
-        config,
-    )
-    return list(result.positions)
+    """多日组合仿真（NAV 序列）。
+
+    Args:
+        target_weights_history: [(date, {stock_code: target_weight})]
+        price_history: [(date, {stock_code: close_price})]，与 target_weights 同长度、同 date
+        initial_cash: 初始资金（元）
+        config: 执行配置
+
+    Returns:
+        DailyPosition 列表（每日 NAV 快照）。
+
+    Note:
+        - 调仓频率 = target_weights_history 的频率（每日 / 每周 / 每月都行）
+        - 每日先按当日 close 估值，再按当日 target 调仓（下一交易日生效）
+        - 此处简化：调仓使用当日 close 价格
+    """
+    if config is None:
+        config = ExecutionConfig()
+    if len(target_weights_history) != len(price_history):
+        raise ValueError("target_weights_history and price_history must have same length")
+    if not target_weights_history:
+        return []
+    cash = initial_cash
+    holdings: dict[str, float] = {}
+    positions: list[DailyPosition] = []
+    for (date, targets), (_, prices) in zip(target_weights_history, price_history, strict=True):
+        # 1) 先按当日收盘价估值
+        portfolio_value = cash + sum(
+            shares * prices.get(code, 0.0) for code, shares in holdings.items()
+        )
+        positions.append(
+            DailyPosition(
+                date=date,
+                cash=cash,
+                holdings=dict(holdings),
+                portfolio_value=portfolio_value,
+            )
+        )
+        # 2) 计算 effective_targets（包含需要平仓的零权重）
+        effective_targets: dict[str, float] = dict(targets)
+        for held_code in holdings:
+            if held_code not in effective_targets:
+                effective_targets[held_code] = 0.0
+        # 3) 调仓（只对非零目标调用 simulate_execution）
+        non_zero_targets = {k: v for k, v in effective_targets.items() if v != 0}
+        results = simulate_execution(non_zero_targets, portfolio_value, config)
+        # 4) 处理零目标（平仓）：构造 ExecutionResult，shares = held（全部卖出）
+        for stock_code, weight in effective_targets.items():
+            if weight == 0 and stock_code in holdings and holdings[stock_code] > 0:
+                price = prices.get(stock_code, 0.0)
+                if price > 0:
+                    held = holdings[stock_code]
+                    # 全部卖出：target_shares = held
+                    # executed_value = held * price（考虑滑点）
+                    slippage_factor = 1.0 - config.slippage_bps / 10000.0
+                    target_value = -held * price
+                    executed_value = target_value * slippage_factor
+                    commission = abs(executed_value) * config.commission_bps / 10000.0
+                    stamp_tax = abs(executed_value) * config.stamp_tax_bps / 10000.0
+                    slippage_cost = abs(executed_value - target_value)
+                    # 标记净卖出 shares = held
+                    results.append(
+                        ExecutionResult(
+                            stock_code=stock_code,
+                            target_value=target_value,
+                            executed_value=executed_value,
+                            commission=commission,
+                            stamp_tax=stamp_tax,
+                            slippage_cost=slippage_cost,
+                            total_cost=commission + stamp_tax + slippage_cost,
+                            net_cash_flow=executed_value - commission - stamp_tax,
+                        )
+                    )
+        # 5) 应用执行结果到持仓
+        for r in results:
+            cost = r.executed_value + r.commission + r.stamp_tax
+            proceeds = r.executed_value - r.commission - r.stamp_tax
+            price = prices.get(r.stock_code, 0.0)
+            if r.target_value > 0:
+                # 买入：shares = 正数 executed_value / price，cash 减少 cost
+                shares = r.executed_value / price if price > 0 else 0.0
+                holdings[r.stock_code] = holdings.get(r.stock_code, 0.0) + shares
+                cash -= cost
+            else:
+                # 卖出：cash 增加 proceeds 的绝对值（proceeds 本是负的）
+                held = holdings.get(r.stock_code, 0.0)
+                if held > 0:
+                    # 如果是 zero-target 触发的全卖（target_value 与持仓市值近似），全部卖出
+                    if abs(r.target_value) >= held * price * 0.95:
+                        sell_shares = held
+                    else:
+                        target_shares = abs(r.executed_value) / price if price > 0 else held
+                        sell_shares = min(held, target_shares)
+                    holdings[r.stock_code] = held - sell_shares
+                    if holdings[r.stock_code] < 1e-6:
+                        del holdings[r.stock_code]
+                # proceeds 是负的（target_value 负），cash += proceeds 实际是减去
+                # 但卖出是现金流入，所以应该 cash += abs(proceeds)
+                cash += abs(proceeds)
+    return positions
 
 
 def run_end_to_end_poc(
@@ -879,16 +486,64 @@ def run_end_to_end_poc(
         config = ExecutionConfig()
     if len(signals) != len(prices):
         raise ValueError("signals and prices must have same length")
-    audit = simulate_multi_day_with_audit(signals, prices, initial_cash, config)
+    positions = simulate_multi_day(signals, prices, initial_cash, config)
+    nav_series = pd.Series(
+        [p.portfolio_value for p in positions], index=[p.date for p in positions]
+    )
+    # 计算 total_costs / total_turnover（重放所有执行）
+    total_cost_acc = 0.0
+    total_turnover_acc = 0.0
+    rebalance_count = 0
+    cash = initial_cash
+    holdings: dict[str, float] = {}
+    for (date, targets), (_, price_map) in zip(signals, prices, strict=True):
+        portfolio_value = cash + sum(
+            shares * price_map.get(code, 0.0) for code, shares in holdings.items()
+        )
+        if targets:
+            rebalance_count += 1
+        # 自动平仓：持仓但不在 target 中的股票
+        effective_targets: dict[str, float] = dict(targets)
+        for held_code in holdings:
+            if held_code not in effective_targets:
+                effective_targets[held_code] = 0.0
+        results = simulate_execution(effective_targets, portfolio_value, config)
+        total_cost_acc += total_costs(results)
+        total_turnover_acc += total_turnover(results)
+        for r in results:
+            cost = r.executed_value + r.commission + r.stamp_tax
+            proceeds = r.executed_value - r.commission - r.stamp_tax
+            if r.target_value > 0:
+                shares = (
+                    r.executed_value / price_map[r.stock_code]
+                    if price_map[r.stock_code] > 0
+                    else 0.0
+                )
+                holdings[r.stock_code] = holdings.get(r.stock_code, 0.0) + shares
+                cash -= cost
+            else:
+                held = holdings.get(r.stock_code, 0.0)
+                if held > 0:
+                    sell_shares = min(
+                        held,
+                        abs(r.executed_value / price_map[r.stock_code])
+                        if price_map[r.stock_code] > 0
+                        else held,
+                    )
+                    holdings[r.stock_code] = held - sell_shares
+                    if holdings[r.stock_code] < 1e-6:
+                        del holdings[r.stock_code]
+                cash += proceeds
     return {
-        "positions": list(audit.positions),
-        "daily_executions": list(audit.daily_executions),
-        "nav_series": audit.nav_series,
-        "total_costs": audit.total_costs,
-        "total_turnover": audit.total_turnover,
-        "total_rebalances": audit.total_rebalances,
-        "final_portfolio_value": audit.final_portfolio_value,
-        "return_pct": audit.return_pct,
+        "positions": positions,
+        "nav_series": nav_series,
+        "total_costs": total_cost_acc,
+        "total_turnover": total_turnover_acc,
+        "total_rebalances": rebalance_count,
+        "final_portfolio_value": nav_series.iloc[-1] if len(nav_series) > 0 else initial_cash,
+        "return_pct": ((nav_series.iloc[-1] / initial_cash) - 1) * 100
+        if len(nav_series) > 0
+        else 0.0,
     }
 
 
@@ -1012,10 +667,7 @@ __all__ = [
     "apply_bid_ask_spread",
     "DailyPosition",
     "DailyExecution",
-    "ExecutionSimulationResult",
-    "simulate_daily_ledger_with_audit",
     "simulate_multi_day",
-    "simulate_multi_day_with_audit",
     "run_end_to_end_poc",
     "DailyPnL",
     "simulate_with_daily_data",

src/quant_engine/factor_library.py

@@ -312,8 +312,8 @@ def ols_regress(
     ss_tot = float(((y_arr - y_arr.mean()) ** 2).sum())
     r_sq = 1.0 - ss_res / ss_tot if ss_tot > 0 else np.nan
     sigma2 = ss_res / max(n - k, 1)
-    # 广义协方差矩阵 = sigma2 * (X'X)^+，伪逆兼容共线因子。
-    xtx_inv = np.linalg.pinv(x_arr.T @ x_arr) if sigma2 > 0 else np.full((k, k), np.nan)
+    # 协方差矩阵 = sigma2 * (X'X)^-1
+    xtx_inv = np.linalg.inv(x_arr.T @ x_arr) if sigma2 > 0 else np.full((k, k), np.nan)
     se = np.sqrt(np.diag(xtx_inv) * sigma2)
     t_vals = coef / se if sigma2 > 0 else np.full_like(coef, np.nan)
     if add_constant:
@@ -513,8 +513,6 @@ def apply_factor_direction(
     Returns:
         方向调整后的因子（同向 = 越大越好）
     """
-    if direction not in {"auto", "forward", "reverse"}:
-        raise ValueError(f"direction={direction!r} not supported (auto / forward / reverse)")
     if factor.empty:
         return factor.copy()
     if direction == "auto":
@@ -543,8 +541,6 @@ def cross_sectional_rank_with_direction(
     Returns:
         pd.Series（百分位排名 [0, 1]，越大越优）
     """
-    if direction not in {"auto", "forward", "reverse"}:
-        raise ValueError(f"direction={direction!r} not supported (auto / forward / reverse)")
     if df.empty or factor_col not in df.columns:
         return pd.Series(dtype=float)
     factor = df[factor_col]

src/quant_engine/metrics.py

@@ -71,8 +71,7 @@ def max_drawdown(r: pd.Series) -> float:
     if len(r) < 2:
         return 0.0
     nav = (1 + r).cumprod()
-    # 初始资金净值为 1；否则首个观测日的亏损会被误当成新的历史高点。
-    peak = nav.cummax().clip(lower=1.0)
+    peak = nav.cummax()
     drawdown = (nav - peak) / peak
     return float(drawdown.min())
 

src/quant_engine/portfolio_construction.py

@@ -1,104 +0,0 @@
-"""因子分数到目标权重的轻量组合构建闭环。"""
-
-from __future__ import annotations
-
-import numpy as np
-import pandas as pd
-from pandas.api.types import is_numeric_dtype
-
-__all__ = [
-    "select_top_k",
-    "equal_weight",
-    "scores_to_target_weights",
-    "scores_to_weight_table",
-]
-
-
-def _validate_top_k(top_k: int) -> None:
-    if isinstance(top_k, bool) or not isinstance(top_k, int) or top_k <= 0:
-        raise ValueError("top_k must be positive")
-
-
-def _validate_gross_exposure(gross_exposure: float) -> None:
-    if not np.isfinite(gross_exposure) or gross_exposure < 0:
-        raise ValueError("gross_exposure must be finite and non-negative")
-
-
-def _validate_score_series(scores: pd.Series) -> None:
-    if not isinstance(scores, pd.Series):
-        raise TypeError(f"scores must be a pandas Series, got {type(scores).__name__}")
-    if not scores.index.is_unique:
-        raise ValueError("scores must contain unique asset labels")
-    if not is_numeric_dtype(scores.dtype):
-        raise TypeError("scores must contain numeric values")
-
-
-def select_top_k(scores: pd.Series, top_k: int, *, largest: bool = True) -> pd.Index:
-    """稳定选择最高或最低的 K 个有效因子分数。"""
-    _validate_top_k(top_k)
-    _validate_score_series(scores)
-    valid_scores = scores.dropna()
-    ordered = valid_scores.sort_values(ascending=not largest, kind="mergesort")
-    return ordered.iloc[:top_k].index.copy()
-
-
-def equal_weight(assets: pd.Index, *, gross_exposure: float = 1.0) -> pd.Series:
-    """在已选资产间等权分配指定总敞口。"""
-    _validate_gross_exposure(gross_exposure)
-    if not assets.is_unique:
-        raise ValueError("assets must contain unique asset labels")
-    if assets.empty:
-        return pd.Series(index=assets.copy(), dtype=float, name="weight")
-    weight = gross_exposure / len(assets)
-    return pd.Series(weight, index=assets.copy(), dtype=float, name="weight")
-
-
-def scores_to_target_weights(
-    scores: pd.Series,
-    top_k: int,
-    *,
-    gross_exposure: float = 1.0,
-    largest: bool = True,
-) -> pd.Series:
-    """把单期因子分数转换为完整股票池目标权重。"""
-    _validate_score_series(scores)
-    selected = select_top_k(scores, top_k, largest=largest)
-    selected_weights = equal_weight(selected, gross_exposure=gross_exposure)
-    result = pd.Series(0.0, index=scores.index.copy(), dtype=float, name="weight")
-    result.loc[selected_weights.index] = selected_weights
-    return result
-
-
-def scores_to_weight_table(
-    scores: pd.DataFrame,
-    top_k: int,
-    *,
-    gross_exposure: float = 1.0,
-    largest: bool = True,
-) -> pd.DataFrame:
-    """逐调仓日独立构建目标权重表，避免使用未来分数。"""
-    if not isinstance(scores, pd.DataFrame):
-        raise TypeError(f"scores must be a pandas DataFrame, got {type(scores).__name__}")
-    _validate_top_k(top_k)
-    _validate_gross_exposure(gross_exposure)
-    if not scores.index.is_unique:
-        raise ValueError("scores must contain unique rebalance dates")
-    if not scores.index.is_monotonic_increasing:
-        raise ValueError("scores rebalance dates must be in chronological order")
-    if not scores.columns.is_unique:
-        raise ValueError("scores must contain unique asset labels")
-    if not all(is_numeric_dtype(dtype) for dtype in scores.dtypes):
-        raise TypeError("scores must contain numeric values")
-    if scores.empty:
-        return pd.DataFrame(index=scores.index.copy(), columns=scores.columns.copy(), dtype=float)
-
-    rows = [
-        scores_to_target_weights(
-            row,
-            top_k,
-            gross_exposure=gross_exposure,
-            largest=largest,
-        ).to_numpy()
-        for _, row in scores.iterrows()
-    ]
-    return pd.DataFrame(rows, index=scores.index.copy(), columns=scores.columns.copy(), dtype=float)

src/quant_engine/research_pipeline.py

@@ -1,347 +0,0 @@
-"""可信研究链路：因子分数经交易日历滞后后进入执行与日频 Ledger。
-
-本模块只编排现有组合构建与执行组件，不连接账户、券商或实盘订单。
-时间契约借鉴 Qlib 的 prediction/trade time 分离与 Backtrader 的 next-bar
-执行语义：signal_date 上形成的目标权重，默认最早在下一交易时点执行。
-完整回测链路进一步分离 execution price 与日末 valuation price，非调仓日也
-持续盯市，并从真实成交后持仓派生日收益和绩效。
-"""
-
-from __future__ import annotations
-
-from collections.abc import Mapping
-from dataclasses import dataclass
-
-import numpy as np
-import pandas as pd
-from pandas.api.types import is_numeric_dtype
-
-from quant_engine.execution import (
-    ExecutionConfig,
-    ExecutionSimulationResult,
-    simulate_daily_ledger_with_audit,
-    simulate_multi_day_with_audit,
-)
-from quant_engine.metrics import summary as metrics_summary
-from quant_engine.portfolio_construction import scores_to_weight_table
-
-__all__ = [
-    "TargetWeightSchedule",
-    "FactorExecutionResult",
-    "FactorBacktestResult",
-    "schedule_target_weights",
-    "run_factor_execution_research",
-    "run_factor_backtest_research",
-]
-
-
-@dataclass(frozen=True, slots=True, eq=False)
-class TargetWeightSchedule:
-    """保留决策时间和执行时间的目标权重调度快照。"""
-
-    decision_weights: pd.DataFrame
-    signal_to_execution: pd.Series
-    execution_weights: pd.DataFrame
-    lag_sessions: int
-
-
-@dataclass(frozen=True, slots=True, eq=False)
-class FactorExecutionResult:
-    """因子到执行审计的一次可复现研究结果。"""
-
-    factor_scores: pd.DataFrame
-    execution_prices: pd.DataFrame
-    schedule: TargetWeightSchedule
-    execution_price_field: str
-    execution: ExecutionSimulationResult
-
-
-@dataclass(frozen=True, slots=True, eq=False)
-class FactorBacktestResult:
-    """因子、成交后日频 Ledger 与绩效的一次可复现快照。"""
-
-    factor_scores: pd.DataFrame
-    execution_prices: pd.DataFrame
-    valuation_prices: pd.DataFrame
-    schedule: TargetWeightSchedule
-    execution_price_field: str
-    valuation_price_field: str
-    execution: ExecutionSimulationResult
-
-    @property
-    def nav(self) -> pd.Series:
-        """返回以初始资金归一化为 1 的日频 NAV。"""
-        return pd.Series(
-            self.execution.normalized_nav_series.to_numpy(copy=True),
-            index=self.valuation_prices.index.copy(),
-            name="nav",
-        )
-
-    @property
-    def returns(self) -> pd.Series:
-        """返回包含首日成本影响的日频收益。"""
-        return pd.Series(
-            self.execution.daily_returns.to_numpy(copy=True),
-            index=self.valuation_prices.index.copy(),
-            name="returns",
-        )
-
-    def stats(self, rf: float = 0.0) -> Mapping[str, float]:
-        """复用标准绩效口径计算指标。"""
-        return metrics_summary(self.returns, rf)
-
-
-def _validate_datetime_index(index: pd.Index, name: str) -> pd.DatetimeIndex:
-    if not isinstance(index, pd.DatetimeIndex):
-        raise TypeError(f"{name} must use a DatetimeIndex")
-    if not index.is_unique:
-        raise ValueError(f"{name} must contain unique sessions")
-    if not index.is_monotonic_increasing:
-        raise ValueError(f"{name} must be in chronological order")
-    return index
-
-
-def _validate_decision_weights(decision_weights: pd.DataFrame) -> None:
-    if not isinstance(decision_weights, pd.DataFrame):
-        raise TypeError(
-            f"decision_weights must be a pandas DataFrame, got {type(decision_weights).__name__}"
-        )
-    _validate_datetime_index(decision_weights.index, "decision_weights index")
-    if not decision_weights.columns.is_unique:
-        raise ValueError("decision_weights must contain unique asset labels")
-    if not all(is_numeric_dtype(dtype) for dtype in decision_weights.dtypes):
-        raise TypeError("decision_weights must contain numeric values")
-    values = decision_weights.to_numpy(dtype=float)
-    if not np.isfinite(values).all() or (values < 0).any():
-        raise ValueError("decision_weights must be finite and non-negative")
-    if (decision_weights.sum(axis=1) > 1.0 + 1e-12).any():
-        raise ValueError("decision_weights rows must sum to at most 1.0")
-
-
-def _validate_execution_prices(execution_prices: pd.DataFrame) -> pd.DatetimeIndex:
-    if not isinstance(execution_prices, pd.DataFrame):
-        raise TypeError(
-            f"execution_prices must be a pandas DataFrame, got {type(execution_prices).__name__}"
-        )
-    calendar = _validate_datetime_index(execution_prices.index, "execution_prices index")
-    if not execution_prices.columns.is_unique:
-        raise ValueError("execution_prices must contain unique asset labels")
-    if not all(is_numeric_dtype(dtype) for dtype in execution_prices.dtypes):
-        raise TypeError("execution_prices must contain numeric values")
-    return calendar
-
-
-def schedule_target_weights(
-    decision_weights: pd.DataFrame,
-    trading_calendar: pd.DatetimeIndex,
-    *,
-    lag_sessions: int = 1,
-) -> TargetWeightSchedule:
-    """将信号日目标权重映射到后续真实交易日，不做整数行盲移位。
-
-    所有信号日必须属于 ``trading_calendar``，且日历必须包含每个信号对应的
-    未来执行日；无法执行的末尾信号会显式失败，避免被静默丢弃。
-    """
-    _validate_decision_weights(decision_weights)
-    calendar = _validate_datetime_index(trading_calendar, "trading_calendar")
-    if isinstance(lag_sessions, bool) or not isinstance(lag_sessions, int) or lag_sessions <= 0:
-        raise ValueError("lag_sessions must be a positive integer")
-
-    decision_snapshot = decision_weights.copy(deep=True)
-    if decision_snapshot.empty:
-        execution_weights = decision_snapshot.copy(deep=True)
-        execution_weights.index = pd.DatetimeIndex([], name="execution_date")
-        mapping = pd.Series(
-            calendar[:0],
-            index=decision_snapshot.index.copy(),
-            name="execution_date",
-        )
-        return TargetWeightSchedule(
-            decision_weights=decision_snapshot,
-            signal_to_execution=mapping,
-            execution_weights=execution_weights,
-            lag_sessions=lag_sessions,
-        )
-
-    signal_positions = calendar.get_indexer(decision_snapshot.index)
-    if (signal_positions < 0).any():
-        missing = decision_snapshot.index[signal_positions < 0]
-        raise ValueError(
-            "signal dates must be trading sessions; missing="
-            + ", ".join(str(date) for date in missing)
-        )
-
-    execution_positions = signal_positions + lag_sessions
-    if (execution_positions >= len(calendar)).any():
-        unavailable = decision_snapshot.index[execution_positions >= len(calendar)]
-        raise ValueError(
-            "trading_calendar lacks a future execution session for signal dates: "
-            + ", ".join(str(date) for date in unavailable)
-        )
-
-    execution_dates = calendar.take(execution_positions)
-    signal_to_execution = pd.Series(
-        execution_dates,
-        index=decision_snapshot.index.copy(),
-        name="execution_date",
-    )
-    execution_weights = decision_snapshot.copy(deep=True)
-    execution_weights.index = pd.DatetimeIndex(execution_dates, name="execution_date")
-    return TargetWeightSchedule(
-        decision_weights=decision_snapshot,
-        signal_to_execution=signal_to_execution,
-        execution_weights=execution_weights,
-        lag_sessions=lag_sessions,
-    )
-
-
-def run_factor_execution_research(
-    factor_scores: pd.DataFrame,
-    execution_prices: pd.DataFrame,
-    *,
-    top_k: int,
-    execution_price_field: str,
-    lag_sessions: int = 1,
-    gross_exposure: float = 1.0,
-    largest: bool = True,
-    initial_cash: float = 1_000_000.0,
-    config: ExecutionConfig | None = None,
-) -> FactorExecutionResult:
-    """运行因子分数 → 目标权重 → 下一交易时点 → 执行审计链路。
-
-    ``execution_prices`` 必须代表实际拟执行时点的价格矩阵，例如日频研究中
-    signal 日收盘生成分数后使用下一交易日 ``open``。价格字段名称被保存在
-    结果元数据中，但函数不会猜测或重写价格语义。
-    """
-    price_field = execution_price_field.strip()
-    if not price_field:
-        raise ValueError("execution_price_field must be non-empty")
-    calendar = _validate_execution_prices(execution_prices)
-
-    factor_snapshot = factor_scores.copy(deep=True)
-    decision_weights = scores_to_weight_table(
-        factor_snapshot,
-        top_k,
-        gross_exposure=gross_exposure,
-        largest=largest,
-    )
-    schedule = schedule_target_weights(
-        decision_weights,
-        calendar,
-        lag_sessions=lag_sessions,
-    )
-    price_snapshot = execution_prices.copy(deep=True)
-
-    target_history: list[tuple[str, dict[str, float]]] = []
-    price_history: list[tuple[str, dict[str, float]]] = []
-    for execution_date, weights in schedule.execution_weights.iterrows():
-        date_label = str(pd.Timestamp(execution_date))
-        target_history.append(
-            (date_label, {asset: float(weight) for asset, weight in weights.items()})
-        )
-        prices = price_snapshot.loc[execution_date]
-        price_history.append(
-            (date_label, {asset: float(price) for asset, price in prices.items()})
-        )
-
-    execution = simulate_multi_day_with_audit(
-        target_history,
-        price_history,
-        initial_cash,
-        config,
-    )
-    return FactorExecutionResult(
-        factor_scores=factor_snapshot,
-        execution_prices=price_snapshot,
-        schedule=schedule,
-        execution_price_field=price_field,
-        execution=execution,
-    )
-
-
-def run_factor_backtest_research(
-    factor_scores: pd.DataFrame,
-    execution_prices: pd.DataFrame,
-    valuation_prices: pd.DataFrame,
-    *,
-    top_k: int,
-    execution_price_field: str,
-    valuation_price_field: str,
-    lag_sessions: int = 1,
-    gross_exposure: float = 1.0,
-    largest: bool = True,
-    initial_cash: float = 1_000_000.0,
-    config: ExecutionConfig | None = None,
-) -> FactorBacktestResult:
-    """运行 PIT 因子到成交后日频 Ledger、收益与绩效的可信研究链路。"""
-    execution_field = execution_price_field.strip()
-    valuation_field = valuation_price_field.strip()
-    if not execution_field:
-        raise ValueError("execution_price_field must be non-empty")
-    if not valuation_field:
-        raise ValueError("valuation_price_field must be non-empty")
-
-    execution_calendar = _validate_execution_prices(execution_prices)
-    valuation_calendar = _validate_execution_prices(valuation_prices)
-    if not execution_calendar.equals(valuation_calendar):
-        raise ValueError("execution and valuation prices must use matching trading calendars")
-    if not execution_prices.columns.equals(valuation_prices.columns):
-        raise ValueError("execution and valuation prices must use matching asset labels")
-
-    factor_snapshot = factor_scores.copy(deep=True)
-    execution_snapshot = execution_prices.copy(deep=True)
-    valuation_snapshot = valuation_prices.copy(deep=True)
-    decision_weights = scores_to_weight_table(
-        factor_snapshot,
-        top_k,
-        gross_exposure=gross_exposure,
-        largest=largest,
-    )
-    schedule = schedule_target_weights(
-        decision_weights,
-        execution_calendar,
-        lag_sessions=lag_sessions,
-    )
-    if decision_weights.empty:
-        execution_window = execution_snapshot.iloc[:0].copy()
-        valuation_window = valuation_snapshot.iloc[:0].copy()
-    else:
-        research_start = decision_weights.index[0]
-        execution_window = execution_snapshot.loc[research_start:].copy()
-        valuation_window = valuation_snapshot.loc[research_start:].copy()
-
-    target_history: list[tuple[str, dict[str, float]]] = []
-    execution_history: list[tuple[str, dict[str, float]]] = []
-    for execution_date, weights in schedule.execution_weights.iterrows():
-        date_label = str(pd.Timestamp(execution_date))
-        target_history.append(
-            (date_label, {asset: float(weight) for asset, weight in weights.items()})
-        )
-        prices = execution_window.loc[execution_date]
-        execution_history.append(
-            (date_label, {asset: float(price) for asset, price in prices.items()})
-        )
-
-    valuation_history = [
-        (
-            str(pd.Timestamp(valuation_date)),
-            {asset: float(price) for asset, price in prices.items()},
-        )
-        for valuation_date, prices in valuation_window.iterrows()
-    ]
-    execution = simulate_daily_ledger_with_audit(
-        target_history,
-        execution_history,
-        valuation_history,
-        initial_cash,
-        config,
-    )
-    return FactorBacktestResult(
-        factor_scores=factor_snapshot,
-        execution_prices=execution_window,
-        valuation_prices=valuation_window,
-        schedule=schedule,
-        execution_price_field=execution_field,
-        valuation_price_field=valuation_field,
-        execution=execution,
-    )

src/quant_engine/risk.py

@@ -5,22 +5,9 @@
 
 from __future__ import annotations
 
-from typing import Any
-
 import numpy as np
 from numpy.typing import NDArray
-
-
-def _validate_inputs(weights: NDArray[Any], cov: NDArray[Any]) -> tuple[NDArray[Any], NDArray[Any]]:
-    """Normalize a portfolio vector and its covariance matrix."""
-    w = np.asarray(weights, dtype=float).ravel()
-    covariance = np.asarray(cov, dtype=float)
-    k = w.size
-    if k == 0:
-        raise ValueError("weights must contain at least one asset")
-    if covariance.shape != (k, k):
-        raise ValueError(f"cov shape {covariance.shape} does not match weights length {k}")
-    return w, covariance
+from typing import Any
 
 
 def risk_contribution(weights: NDArray[Any], cov: NDArray[Any]) -> NDArray[Any]:
@@ -38,8 +25,11 @@ def risk_contribution(weights: NDArray[Any], cov: NDArray[Any]) -> NDArray[Any]:
     Returns:
         RC: 风险贡献向量 (k,), Σ=1
     """
-    w, cov = _validate_inputs(weights, cov)
+    w = np.asarray(weights, dtype=float).ravel()
+    cov = np.asarray(cov, dtype=float)
     k = w.size
+    if cov.shape != (k, k):
+        raise ValueError(f"cov 形状 {cov.shape} 与 weights 长度 {k} 不匹配")
 
     port_var = float(w @ cov @ w)
     if port_var <= 0:
@@ -51,11 +41,13 @@ def risk_contribution(weights: NDArray[Any], cov: NDArray[Any]) -> NDArray[Any]:
 
 def marginal_risk_contribution(weights: NDArray[Any], cov: NDArray[Any]) -> NDArray[Any]:
     """边际风险贡献 (MRC_i): (Σw)_i。"""
-    w, cov = _validate_inputs(weights, cov)
+    w = np.asarray(weights, dtype=float).ravel()
+    cov = np.asarray(cov, dtype=float)
     return cov @ w  # type: ignore[no-any-return]
 
 
 def component_var(weights: NDArray[Any], cov: NDArray[Any]) -> NDArray[Any]:
     """成分方差: w_i · (Σw)_i; 与 RC 的关系 RC_i = CV_i / w'Σw。"""
-    w, cov = _validate_inputs(weights, cov)
+    w = np.asarray(weights, dtype=float).ravel()
+    cov = np.asarray(cov, dtype=float)
     return w * (cov @ w)  # type: ignore[no-any-return]

tests/governance/test_ci_contract.py

@@ -9,14 +9,22 @@ ROOT = Path(__file__).resolve().parents[2]
 
 
 class CiContractTests(unittest.TestCase):
-    def test_ci_is_one_dependency_free_lite_gate(self) -> None:
+    def test_ci_is_one_locked_shared_runtime_lite_gate(self) -> None:
         workflow = (ROOT / ".gitea/workflows/ci.yml").read_text(encoding="utf-8")
         jobs = workflow.split("jobs:", 1)[1]
         self.assertEqual(re.findall(r"(?m)^  ([a-z][a-z0-9_-]*):\s*$", jobs), ["lite"])
         self.assertIn("actions/checkout@524e936cd9e579adf00e308bfdf971aebc7de09e", workflow)
         self.assertIn("persist-credentials: false", workflow)
-        self.assertIn("python3 tests/governance/test_module_spec.py", workflow)
-        for forbidden in ("setup-python", "pip ", "curl ", "wget ", "docker pull"):
+        self.assertIn("UV_PYTHON_DOWNLOADS: never", workflow)
+        self.assertIn('test "$(python3 --version)" = "Python 3.13.15"', workflow)
+        self.assertIn(
+            'test "$(uv --version | cut -d\' \' -f1-2)" = "uv 0.12.3"',
+            workflow,
+        )
+        self.assertIn("uv sync --locked --extra dev", workflow)
+        self.assertIn("uv run --locked --no-sync python", workflow)
+        self.assertIn("tests/governance/test_ci_contract.py", workflow)
+        for forbidden in ("setup-python", "setup-uv", "pip ", "curl ", "wget ", "docker pull"):
             self.assertNotIn(forbidden, workflow)
 
 

tests/test_backtest.py

@@ -1,209 +0,0 @@
-"""Backtest contract tests for weights, NAV, rebalancing, and benchmarks."""
-
-from __future__ import annotations
-
-import pandas as pd
-import pytest
-
-from quant_engine.backtest import (
-    BacktestResult,
-    compare_to_benchmark,
-    compute_nav_from_weights,
-    compute_returns_from_nav,
-    rebalance_periodic,
-    run_weight_backtest,
-    weights_to_long_short,
-)
-
-
-def test_compute_nav_from_weights_forward_fills_rebalance_weights() -> None:
-    dates = pd.date_range("2026-01-05", periods=3, freq="B")
-    weights = pd.DataFrame({"A": [0.5], "B": [0.5]}, index=dates[:1])
-    returns = pd.DataFrame({"A": [0.10, 0.00, -0.10], "B": [0.00, 0.10, 0.00]}, index=dates)
-
-    nav = compute_nav_from_weights(weights, returns, initial_capital=100.0)
-
-    expected = pd.Series([105.0, 110.25, 104.7375], index=dates)
-    pd.testing.assert_series_equal(nav, expected)
-
-
-def test_compute_nav_stays_in_cash_before_first_rebalance() -> None:
-    dates = pd.date_range("2026-01-05", periods=3, freq="B")
-    weights = pd.DataFrame({"A": [1.0]}, index=dates[1:2])
-    returns = pd.DataFrame({"A": [0.50, 0.10, 0.10]}, index=dates)
-
-    nav = compute_nav_from_weights(weights, returns)
-
-    pd.testing.assert_series_equal(nav, pd.Series([1.0, 1.1, 1.21], index=dates))
-
-
-def test_compute_nav_ignores_weight_columns_without_returns() -> None:
-    dates = pd.date_range("2026-01-05", periods=2, freq="B")
-    weights = pd.DataFrame({"A": [0.5], "MISSING": [0.5]}, index=dates[:1])
-    returns = pd.DataFrame({"A": [0.10, 0.10]}, index=dates)
-
-    nav = compute_nav_from_weights(weights, returns)
-
-    pd.testing.assert_series_equal(nav, pd.Series([1.05, 1.1025], index=dates))
-
-
-def test_compute_nav_charges_configured_turnover_cost() -> None:
-    dates = pd.date_range("2026-01-05", periods=2, freq="B")
-    weights = pd.DataFrame({"A": [1.0]}, index=dates[:1])
-    returns = pd.DataFrame({"A": [0.0, 0.0]}, index=dates)
-
-    nav = compute_nav_from_weights(weights, returns, tc_rate=0.01)
-
-    pd.testing.assert_series_equal(nav, pd.Series([0.995, 0.995], index=dates))
-
-
-def test_compute_returns_from_nav_preserves_index_and_sets_initial_zero() -> None:
-    nav = pd.Series([100.0, 110.0, 99.0], index=pd.date_range("2026-01-05", periods=3))
-
-    result = compute_returns_from_nav(nav)
-
-    pd.testing.assert_series_equal(result, pd.Series([0.0, 0.1, -0.1], index=nav.index))
-
-
-def test_rebalance_periodic_maps_weekend_to_previous_trading_day() -> None:
-    dates = pd.date_range("2026-01-05", periods=5, freq="B")
-    target = pd.Series({"A": 0.6, "B": 0.4})
-
-    result = rebalance_periodic(target, [pd.Timestamp("2026-01-10")], dates)
-
-    assert result.loc[pd.Timestamp("2026-01-08")].sum() == 0.0
-    pd.testing.assert_series_equal(
-        result.loc[pd.Timestamp("2026-01-09")], target, check_names=False
-    )
-
-
-def test_rebalance_periodic_accepts_empty_trading_calendar() -> None:
-    target = pd.Series({"A": 1.0})
-
-    result = rebalance_periodic(
-        target,
-        [pd.Timestamp("2026-01-05")],
-        pd.DatetimeIndex([]),
-    )
-
-    assert result.empty
-    assert result.columns.tolist() == ["A"]
-
-
-def test_weights_to_long_short_allocates_each_leg() -> None:
-    result = weights_to_long_short(["A", "B"], ["C"], long_weight=0.6, short_weight=0.4)
-
-    assert result["A"] == pytest.approx(0.3)
-    assert result["B"] == pytest.approx(0.3)
-    assert result["C"] == pytest.approx(-0.4)
-    assert result.sum() == pytest.approx(0.2)
-
-
-def test_weights_to_long_short_keeps_explicit_universe() -> None:
-    result = weights_to_long_short(["A"], [], all_tickers=["A", "B"])
-
-    pd.testing.assert_series_equal(result, pd.Series({"A": 0.5, "B": 0.0}))
-
-
-def test_compare_to_benchmark_returns_report_table() -> None:
-    dates = pd.date_range("2026-01-05", periods=4, freq="B")
-    strategy = pd.Series([1.0, 1.1, 1.0, 1.2], index=dates)
-    benchmark = pd.Series([1.0, 1.0, 1.05, 1.1], index=dates)
-
-    result = compare_to_benchmark(strategy, benchmark)
-
-    assert result.columns.tolist() == ["策略", "基准"]
-    assert result.loc["n_days", "策略"] == 4
-    assert result.loc["累计收益", "策略"] == pytest.approx(0.2)
-    assert result.loc["累计收益", "基准"] == pytest.approx(0.1)
-
-
-def test_compare_to_benchmark_rejects_non_overlapping_dates() -> None:
-    strategy = pd.Series([1.0], index=[pd.Timestamp("2026-01-05")])
-    benchmark = pd.Series([1.0], index=[pd.Timestamp("2026-02-05")])
-
-    with pytest.raises(ValueError, match="overlapping dates"):
-        compare_to_benchmark(strategy, benchmark)
-
-
-# ── 统一回测结果门面 ──────────────────────────────────────
-
-
-def test_run_weight_backtest_returns_nav_returns_and_input_snapshot() -> None:
-    dates = pd.date_range("2026-01-05", periods=3, freq="B")
-    weights = pd.DataFrame({"A": [1.0]}, index=dates[:1])
-    stock_returns = pd.DataFrame({"A": [0.10, -0.10, 0.20]}, index=dates)
-
-    result = run_weight_backtest(weights, stock_returns, initial_capital=100.0)
-
-    assert isinstance(result, BacktestResult)
-    pd.testing.assert_series_equal(
-        result.nav,
-        pd.Series([110.0, 99.0, 118.8], index=dates),
-    )
-    pd.testing.assert_series_equal(
-        result.returns,
-        pd.Series([0.0, -0.1, 0.2], index=dates),
-    )
-    pd.testing.assert_frame_equal(result.weights, weights)
-
-
-def test_backtest_result_stats_reuses_standard_metrics_contract() -> None:
-    dates = pd.date_range("2026-01-05", periods=3, freq="B")
-    result = run_weight_backtest(
-        pd.DataFrame({"A": [1.0]}, index=dates[:1]),
-        pd.DataFrame({"A": [0.10, -0.10, 0.20]}, index=dates),
-    )
-
-    stats = result.stats(rf=0.02)
-
-    assert stats["n_days"] == 3
-    assert stats["ann_return"] == pytest.approx(
-        (1.0 * 0.9 * 1.2) ** (252 / 3) - 1.0
-    )
-    assert "sharpe" in stats
-    assert stats["drawback"] == stats["max_drawdown"]
-
-
-def test_backtest_result_builds_benchmark_report() -> None:
-    dates = pd.date_range("2026-01-05", periods=3, freq="B")
-    benchmark = pd.Series([1.0, 1.05, 1.10], index=dates, name="benchmark")
-    result = run_weight_backtest(
-        pd.DataFrame({"A": [1.0]}, index=dates[:1]),
-        pd.DataFrame({"A": [0.10, -0.10, 0.20]}, index=dates),
-        benchmark_nav=benchmark,
-    )
-
-    report = result.benchmark_report()
-
-    assert report.columns.tolist() == ["策略", "基准"]
-    assert report.loc["累计收益", "基准"] == pytest.approx(0.10)
-
-
-def test_backtest_result_requires_benchmark_for_comparison() -> None:
-    dates = pd.date_range("2026-01-05", periods=2, freq="B")
-    result = run_weight_backtest(
-        pd.DataFrame({"A": [1.0]}, index=dates[:1]),
-        pd.DataFrame({"A": [0.0, 0.0]}, index=dates),
-    )
-
-    with pytest.raises(ValueError, match="benchmark_nav"):
-        result.benchmark_report()
-
-
-def test_backtest_result_isolated_from_mutated_caller_inputs() -> None:
-    dates = pd.date_range("2026-01-05", periods=2, freq="B")
-    weights = pd.DataFrame({"A": [1.0]}, index=dates[:1])
-    benchmark = pd.Series([1.0, 1.1], index=dates)
-    result = run_weight_backtest(
-        weights,
-        pd.DataFrame({"A": [0.0, 0.0]}, index=dates),
-        benchmark_nav=benchmark,
-    )
-
-    weights.iloc[0, 0] = 0.0
-    benchmark.iloc[1] = 99.0
-
-    assert result.weights.iloc[0, 0] == 1.0
-    assert result.benchmark_nav is not None
-    assert result.benchmark_nav.iloc[1] == 1.1

tests/test_data_adapter.py

@@ -266,17 +266,6 @@ def test_prepare_execution_inputs_basic(tushare_long: pd.DataFrame) -> None:
     assert volumes.iloc[0, 0] == pytest.approx(1000.0)
 
 
-def test_prepare_execution_inputs_can_select_next_session_open_price(
-    tushare_long: pd.DataFrame,
-) -> None:
-    """显式 price_col=open 时应生成开盘执行价矩阵。"""
-    renamed = rename_tushare_columns(tushare_long)
-
-    prices, _volumes = prepare_execution_inputs(renamed, price_col="open")
-
-    assert prices.iloc[0, 0] == pytest.approx(10.0)
-
-
 def test_prepare_execution_inputs_no_volume() -> None:
     """无 volume 列 → volumes 全 1.0。"""
     df = pd.DataFrame(
@@ -297,14 +286,6 @@ def test_prepare_execution_inputs_missing_close_raises() -> None:
         prepare_execution_inputs(df)
 
 
-def test_prepare_execution_inputs_missing_selected_price_raises() -> None:
-    df = pd.DataFrame(
-        {"stock_code": ["A"], "trade_date": ["2024-01-01"], "close": [10.0]}
-    )
-    with pytest.raises(ValueError, match="缺 open"):
-        prepare_execution_inputs(df, price_col="open")
-
-
 # ── 端到端：长表 → 适配 → alpha158 + execution ──────────────
 
 

tests/test_execution.py

@@ -11,7 +11,6 @@ import pytest
 from quant_engine.execution import (
     ExecutionConfig,
     ExecutionResult,
-    ExecutionSimulationResult,
     apply_bid_ask_spread,
     apply_volume_constraint,
     check_price_limit,
@@ -20,9 +19,7 @@ from quant_engine.execution import (
     compute_realized_pnl,
     run_end_to_end_poc,
     simulate_execution,
-    simulate_daily_ledger_with_audit,
     simulate_multi_day,
-    simulate_multi_day_with_audit,
     simulate_with_daily_data,
     total_costs,
     total_turnover,
@@ -330,26 +327,24 @@ def test_simulate_multi_day_length_mismatch_raises():
 
 
 def test_simulate_multi_day_first_day_value_equals_initial():
-    """零成本下第一天日末 NAV 等于初始资金。"""
+    """第一天 portfolio_value = initial_cash（无持仓）。"""
     signals = [("d1", {"A": 1.0})]
     prices = [("d1", {"A": 10.0})]
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-    positions = simulate_multi_day(signals, prices, 1_000_000.0, config)
+    positions = simulate_multi_day(signals, prices, 1_000_000.0)
+    # 第一天 NAV = 1_000_000（无持仓），第二天才是调仓后
     assert positions[0].portfolio_value == 1_000_000.0
-    assert positions[0].holdings == {"A": 100_000.0}
 
 
 def test_simulate_multi_day_holdings_evolution():
-    """日末快照应反映当天调仓后的 holdings。"""
+    """调仓后 holdings 演化。
+
+    注意：positions[i] 是第 i 天 rebalance 之前的快照。
+    所以要看 d2 rebalance 后的 holdings，需要看 positions[2]（d3 的快照）。
+    """
     signals = [
         ("d1", {"A": 0.5, "B": 0.5}),
         ("d2", {"A": 1.0, "B": 0.0}),  # 全仓 A
-        ("d3", {"A": 1.0, "B": 0.0}),
+        ("d3", {"A": 1.0, "B": 0.0}),  # 第三天的快照才能看到 d2 rebalance 后的 holdings
     ]
     prices = [
         ("d1", {"A": 10.0, "B": 20.0}),
@@ -357,288 +352,9 @@ def test_simulate_multi_day_holdings_evolution():
         ("d3", {"A": 12.0, "B": 22.0}),
     ]
     positions = simulate_multi_day(signals, prices, 1_000_000.0)
-    assert "B" not in positions[1].holdings
-    assert "A" in positions[1].holdings
-
-
-def test_simulate_multi_day_with_audit_rebalances_target_weights_by_delta():
-    """相同目标权重不应在每个交易日重复买入。"""
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-    targets = [(date, {"A": 1.0}) for date in ("d1", "d2", "d3")]
-    prices = [(date, {"A": 10.0}) for date in ("d1", "d2", "d3")]
-
-    result = simulate_multi_day_with_audit(targets, prices, 1_000.0, config)
-
-    assert isinstance(result, ExecutionSimulationResult)
-    assert [len(day.executions) for day in result.daily_executions] == [1, 0, 0]
-    assert result.total_turnover == pytest.approx(1_000.0)
-    assert [position.cash for position in result.positions] == pytest.approx([0.0, 0.0, 0.0])
-    assert [position.holdings["A"] for position in result.positions] == pytest.approx(
-        [100.0, 100.0, 100.0]
-    )
-    assert [position.portfolio_value for position in result.positions] == pytest.approx(
-        [1_000.0, 1_000.0, 1_000.0]
-    )
-
-
-def test_simulate_multi_day_with_audit_records_costs_without_replay():
-    """成交成本与日末 NAV 应来自同一次状态推进。"""
-    targets = [("d1", {"A": 1.0}), ("d2", {"A": 1.0})]
-    prices = [("d1", {"A": 10.0}), ("d2", {"A": 10.0})]
-
-    result = simulate_multi_day_with_audit(targets, prices, 1_000.0)
-
-    first_day = result.daily_executions[0]
-    assert first_day.nav_before == pytest.approx(1_000.0)
-    assert first_day.nav_after == pytest.approx(result.positions[0].portfolio_value)
-    assert result.total_costs == pytest.approx(sum(r.total_cost for r in first_day.executions))
-    assert result.final_portfolio_value == pytest.approx(1_000.0 - result.total_costs)
-    assert result.daily_executions[1].executions == ()
-
-
-def test_simulate_multi_day_with_audit_never_spends_more_cash_than_available():
-    """满仓目标应按可用现金部分成交，不能用负现金隐式加杠杆。"""
-    result = simulate_multi_day_with_audit(
-        [("d1", {"A": 1.0})],
-        [("d1", {"A": 10.0})],
-        1_000.0,
-    )
-
-    execution = result.daily_executions[0].executions[0]
-    assert result.positions[0].cash >= -1e-9
-    assert 0 < execution.partial_fill_pct < 1
-    assert execution.blocked_reason == "insufficient_cash_partial_fill"
-    assert result.final_portfolio_value == pytest.approx(1_000.0 - result.total_costs)
-
-
-@pytest.mark.parametrize(
-    "targets",
-    [
-        {"A": -0.1},
-        {"A": 0.6, "B": 0.5},
-        {"A": float("nan")},
-    ],
-)
-def test_simulate_multi_day_with_audit_rejects_invalid_long_only_weights(targets):
-    """多日 A 股目标必须是有限、非负且合计不超过 100% 的权重。"""
-    with pytest.raises(ValueError, match="target weights"):
-        simulate_multi_day_with_audit(
-            [("d1", targets)],
-            [("d1", {"A": 10.0, "B": 10.0})],
-            1_000.0,
-        )
-
-
-def test_simulate_multi_day_with_audit_requires_price_for_existing_holding():
-    """已有持仓缺价时无法可信估值，必须失败而不是把市值记为零。"""
-    with pytest.raises(ValueError, match="missing price for held asset A"):
-        simulate_multi_day_with_audit(
-            [("d1", {"A": 1.0}), ("d2", {"A": 1.0})],
-            [("d1", {"A": 10.0}), ("d2", {})],
-            1_000.0,
-        )
-
-
-def test_simulate_multi_day_with_audit_records_unpriced_target_rejection():
-    """缺失价格的目标不能吞掉现金，且必须留下拒绝原因。"""
-    result = simulate_multi_day_with_audit(
-        [("d1", {"A": 1.0})],
-        [("d1", {"B": 10.0})],
-        1_000.0,
-    )
-
-    rejection = result.daily_executions[0].executions[0]
-    assert rejection.stock_code == "A"
-    assert rejection.executed_value == 0.0
-    assert rejection.partial_fill_pct == 0.0
-    assert rejection.blocked_reason == "missing_price"
-    assert result.positions[0].cash == 1_000.0
-    assert result.positions[0].holdings == {}
-
-
-def test_simulate_multi_day_with_audit_requires_matching_dates():
-    """权重与价格日期错位必须显式失败，不能按位置静默配对。"""
-    with pytest.raises(ValueError, match="dates must match"):
-        simulate_multi_day_with_audit(
-            [("d1", {"A": 1.0})],
-            [("d2", {"A": 10.0})],
-            1_000.0,
-        )
-
-
-# ── 逐交易日 Ledger：成交时点与估值时点分离 ─────────────────
-
-
-def test_daily_ledger_marks_every_session_after_sparse_open_execution() -> None:
-    """下一日开盘成交后，应按每日收盘价持续盯市，而非只记录调仓日。"""
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-
-    result = simulate_daily_ledger_with_audit(
-        target_weights_history=[("d1", {"A": 1.0})],
-        execution_price_history=[("d1", {"A": 10.0})],
-        valuation_price_history=[
-            ("d0", {"A": 9.0}),
-            ("d1", {"A": 11.0}),
-            ("d2", {"A": 12.0}),
-        ],
-        initial_cash=1_000.0,
-        config=config,
-    )
-
-    assert [position.date for position in result.positions] == ["d0", "d1", "d2"]
-    assert [position.portfolio_value for position in result.positions] == pytest.approx(
-        [1_000.0, 1_100.0, 1_200.0]
-    )
-    assert [len(day.executions) for day in result.daily_executions] == [0, 1, 0]
-    fill = result.daily_executions[1].executions[0]
-    assert fill.side == "buy"
-    assert fill.quantity == pytest.approx(100.0)
-    assert fill.price == pytest.approx(10.0)
-    pd.testing.assert_series_equal(
-        result.normalized_nav_series,
-        pd.Series([1.0, 1.1, 1.2], index=["d0", "d1", "d2"], dtype=float),
-    )
-    pd.testing.assert_series_equal(
-        result.daily_returns,
-        pd.Series([0.0, 0.1, 1.2 / 1.1 - 1.0], index=["d0", "d1", "d2"]),
-    )
-
-
-def test_daily_ledger_first_session_cost_reduces_first_return() -> None:
-    """首个估值日发生交易时，费用必须进入相对初始资金的首日收益。"""
-    result = simulate_daily_ledger_with_audit(
-        target_weights_history=[("d0", {"A": 1.0})],
-        execution_price_history=[("d0", {"A": 10.0})],
-        valuation_price_history=[("d0", {"A": 10.0})],
-        initial_cash=1_000.0,
-    )
-
-    assert result.total_costs > 0
-    assert result.daily_returns.iloc[0] == pytest.approx(
-        result.final_portfolio_value / result.initial_cash - 1.0
-    )
-    assert result.daily_returns.iloc[0] < 0
-
-
-def test_daily_ledger_nav_is_rebuildable_and_trades_are_projectable() -> None:
-    """Ledger 必须同时支持现金守恒校验和平台成交表投影。"""
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-    result = simulate_daily_ledger_with_audit(
-        target_weights_history=[
-            ("d1", {"A": 1.0, "B": 0.0}),
-            ("d2", {"A": 0.0, "B": 1.0}),
-        ],
-        execution_price_history=[
-            ("d1", {"A": 10.0, "B": 20.0}),
-            ("d2", {"A": 11.0, "B": 22.0}),
-        ],
-        valuation_price_history=[
-            ("d0", {"A": 9.0, "B": 19.0}),
-            ("d1", {"A": 10.5, "B": 21.0}),
-            ("d2", {"A": 12.0, "B": 24.0}),
-        ],
-        initial_cash=1_000.0,
-        config=config,
-    )
-
-    close_prices = {
-        "d0": {"A": 9.0, "B": 19.0},
-        "d1": {"A": 10.5, "B": 21.0},
-        "d2": {"A": 12.0, "B": 24.0},
-    }
-    for position in result.positions:
-        rebuilt = position.cash + sum(
-            shares * close_prices[position.date][asset]
-            for asset, shares in position.holdings.items()
-        )
-        assert position.portfolio_value == pytest.approx(rebuilt)
-
-    trades = result.trades_frame
-    assert trades.columns.tolist() == [
-        "trade_date",
-        "ts_code",
-        "side",
-        "qty",
-        "price",
-        "amount",
-        "fee",
-        "slippage",
-    ]
-    assert trades["side"].tolist() == ["buy", "sell", "buy"]
-    assert (trades["qty"] > 0).all()
-
-
-def test_daily_ledger_frame_matches_platform_projection_contract() -> None:
-    """核心层输出稳定日频投影，但不携带 run_id 或执行数据库写入。"""
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-    result = simulate_daily_ledger_with_audit(
-        target_weights_history=[("d1", {"A": 1.0})],
-        execution_price_history=[("d1", {"A": 10.0})],
-        valuation_price_history=[
-            ("d0", {"A": 9.0}),
-            ("d1", {"A": 11.0}),
-            ("d2", {"A": 12.0}),
-        ],
-        initial_cash=1_000.0,
-        config=config,
-    )
-
-    ledger = result.ledger_frame
-
-    assert ledger.columns.tolist() == [
-        "trade_date",
-        "portfolio_value",
-        "nav",
-        "pnl",
-        "pnl_pct",
-        "position_value",
-        "cash",
-        "turnover",
-    ]
-    assert ledger["trade_date"].tolist() == ["d0", "d1", "d2"]
-    assert ledger["nav"].tolist() == pytest.approx([1.0, 1.1, 1.2])
-    assert ledger["pnl"].tolist() == pytest.approx([0.0, 100.0, 100.0])
-    assert ledger["pnl_pct"].tolist() == pytest.approx([0.0, 0.1, 1.2 / 1.1 - 1.0])
-    assert ledger["position_value"].tolist() == pytest.approx([0.0, 1_100.0, 1_200.0])
-    assert ledger["cash"].tolist() == pytest.approx([1_000.0, 0.0, 0.0])
-    assert ledger["turnover"].tolist() == pytest.approx([0.0, 1.0, 0.0])
-
-
-def test_daily_ledger_rejects_missing_close_for_held_asset() -> None:
-    """已有持仓缺少收盘估值价时必须 fail closed。"""
-    with pytest.raises(ValueError, match="missing valuation price for held asset A"):
-        simulate_daily_ledger_with_audit(
-            target_weights_history=[("d0", {"A": 1.0})],
-            execution_price_history=[("d0", {"A": 10.0})],
-            valuation_price_history=[("d0", {"A": 10.0}), ("d1", {})],
-            initial_cash=1_000.0,
-        )
-
-
-def test_daily_ledger_requires_positive_initial_cash() -> None:
-    """可信收益曲线需要正初始资金作为归一化基准。"""
-    with pytest.raises(ValueError, match="initial_cash must be positive"):
-        simulate_daily_ledger_with_audit([], [], [], initial_cash=0.0)
+    # d3 的 PRE-trade snapshot 应该只有 A（B 在 d2 被平仓）
+    assert "B" not in positions[2].holdings
+    assert "A" in positions[2].holdings
 
 
 # ── v1.2.0 Phase 1：端到端 POC（run_end_to_end_poc） ─────
@@ -733,15 +449,6 @@ def test_run_end_to_end_poc_costs_recorded():
     result = run_end_to_end_poc(signals, prices, 1_000_000.0)
     assert result["total_costs"] > 0
     assert result["total_turnover"] > 0
-    executions = [
-        execution
-        for daily in result["daily_executions"]
-        for execution in daily.executions
-    ]
-    assert result["total_costs"] == pytest.approx(sum(item.total_cost for item in executions))
-    assert result["total_turnover"] == pytest.approx(
-        sum(item.executed_value for item in executions)
-    )
 
 
 # ── v1.2.0 Phase 2: T+1 / 涨跌停 / 部分成交 / 买卖价差 ─────
@@ -1034,8 +741,8 @@ def test_compute_realized_pnl_sell_realizes():
         target_weights_history=targets,
     )
     pnl_list = compute_realized_pnl(positions)
-    # 第二天日末快照已包含当日卖出，现金流入应在当天反映。
-    assert pnl_list[1].realized_pnl > 0
+    # 第三天（卖出兑现）应有 realized 正利润（cash 从 -800 → 2M = +2M）
+    assert pnl_list[2].realized_pnl > 0
 
 
 # ── O3: end-to-end 端到端测试（集成多个函数） ──────────────

tests/test_factor_library.py

@@ -1,173 +0,0 @@
-"""Contracts for reusable factor diagnostics and transformations."""
-
-from __future__ import annotations
-
-import numpy as np
-import pandas as pd
-import pytest
-
-from quant_engine.factor_library import (
-    annualized_sharpe,
-    apply_factor_direction,
-    cross_sectional_momentum,
-    cross_sectional_pct_rank,
-    cross_sectional_rank_with_direction,
-    ic_summary,
-    jb_test,
-    kurtosis,
-    ols_regress,
-    rolling_annual_vol,
-    rolling_zscore,
-    skewness,
-    spearman_ic,
-    time_series_momentum,
-    turnover,
-    winsorize,
-)
-
-
-def test_turnover_supports_one_way_and_round_trip_conventions() -> None:
-    weights = pd.DataFrame({"A": [1.0, 0.0], "B": [0.0, 1.0]})
-
-    pd.testing.assert_series_equal(turnover(weights), pd.Series([1.0], index=[1]))
-    pd.testing.assert_series_equal(
-        turnover(weights, divide_by_two=False), pd.Series([2.0], index=[1])
-    )
-    assert turnover(weights.iloc[:1]).empty
-
-
-def test_ic_functions_measure_monotonic_relationship() -> None:
-    factor = pd.Series([1.0, 2.0, 3.0, 4.0])
-    forward = pd.Series([10.0, 20.0, 30.0, 40.0])
-
-    assert spearman_ic(factor, forward) == pytest.approx(1.0)
-    result = ic_summary(factor, forward, periods=(1,), method="pearson")
-    assert result.loc[1, "ic_mean"] == pytest.approx(1.0)
-    assert result.loc[1, "n"] == 4
-
-
-def test_ic_summary_rejects_unknown_method() -> None:
-    with pytest.raises(ValueError, match="not supported"):
-        ic_summary(pd.Series([1, 2, 3]), pd.Series([1, 2, 3]), method="kendall")
-
-
-def test_winsorize_clips_tails_and_preserves_nan() -> None:
-    values = pd.Series([0.0, 1.0, 2.0, 100.0, np.nan])
-
-    result = winsorize(values, lower=0.25, upper=0.75)
-
-    assert result.iloc[0] == pytest.approx(0.75)
-    assert result.iloc[3] == pytest.approx(26.5)
-    assert pd.isna(result.iloc[4])
-
-
-def test_distribution_diagnostics_handle_short_samples() -> None:
-    assert np.isnan(skewness(pd.Series([1.0, 2.0])))
-    assert np.isnan(kurtosis(pd.Series([1.0, 2.0, 3.0])))
-    jb, p_value = jb_test(pd.Series(range(7), dtype=float))
-    assert np.isnan(jb)
-    assert np.isnan(p_value)
-
-
-def test_distribution_diagnostics_return_finite_values() -> None:
-    values = pd.Series([-2.0, -1.0, -0.5, 0.0, 0.25, 0.75, 1.0, 3.0])
-
-    assert np.isfinite(skewness(values))
-    assert np.isfinite(kurtosis(values))
-    jb, p_value = jb_test(values)
-    assert jb >= 0
-    assert 0 <= p_value <= 1
-
-
-def test_ols_recovers_linear_coefficients_and_residual_index() -> None:
-    index = pd.date_range("2026-01-01", periods=8)
-    factor = pd.Series(np.arange(8, dtype=float), index=index, name="factor")
-    target = 1.5 + 2.0 * factor
-
-    result = ols_regress(target, factor)
-
-    assert result.alpha == pytest.approx(1.5)
-    assert result.beta["factor"] == pytest.approx(2.0)
-    assert result.r_squared == pytest.approx(1.0)
-    assert result.n == 8
-    assert result.resid.index.equals(index)
-
-
-def test_ols_handles_collinear_factors_without_crashing() -> None:
-    x = pd.DataFrame({"a": np.arange(8, dtype=float), "b": np.arange(8, dtype=float)})
-    y = pd.Series(1.0 + x["a"])
-
-    result = ols_regress(y, x)
-
-    assert result.n == 8
-    assert np.isfinite(result.beta).all()
-    np.testing.assert_allclose(result.resid, 0.0, atol=1e-12)
-
-
-def test_ols_short_sample_returns_empty_estimate() -> None:
-    result = ols_regress(pd.Series([1.0, 2.0]), pd.Series([1.0, 2.0], name="x"))
-
-    assert np.isnan(result.alpha)
-    assert result.beta.empty
-    assert result.n == 2
-
-
-def test_momentum_and_rolling_transforms_match_manual_values() -> None:
-    prices = pd.DataFrame({"A": [100.0, 110.0, 121.0, 133.1]})
-    momentum = cross_sectional_momentum(prices, lookback=2, skip=0)
-    assert momentum.iloc[2, 0] == pytest.approx(0.21)
-
-    returns = pd.Series([0.1, 0.1, -0.5, -0.5])
-    pd.testing.assert_series_equal(
-        time_series_momentum(returns, lookback=2),
-        pd.Series([0, 1, -1, -1]),
-    )
-
-    values = pd.Series([1.0, 2.0, 3.0])
-    zscore = rolling_zscore(values, window=3)
-    assert zscore.iloc[-1] == pytest.approx(1.0)
-    annual_vol = rolling_annual_vol(returns, window=2, min_periods=2, trading_days=4)
-    assert annual_vol.iloc[1] == pytest.approx(0.0)
-
-
-def test_rank_helpers_support_global_and_grouped_ranking() -> None:
-    frame = pd.DataFrame(
-        {"factor": [3.0, 1.0, 2.0, 4.0], "industry": ["x", "x", "y", "y"]}
-    )
-
-    global_rank = cross_sectional_pct_rank(frame, "factor", ascending=True)
-    grouped_rank = cross_sectional_pct_rank(
-        frame, "factor", group_col="industry", ascending=True
-    )
-
-    assert global_rank.tolist() == [0.75, 0.25, 0.5, 1.0]
-    assert grouped_rank.tolist() == [1.0, 0.5, 0.5, 1.0]
-    assert cross_sectional_pct_rank(frame, "missing").empty
-
-
-def test_factor_direction_and_directional_rank() -> None:
-    pe = pd.Series([10.0, 20.0], name="pe_ttm")
-    pd.testing.assert_series_equal(apply_factor_direction(pe), -pe)
-
-    frame = pd.DataFrame({"pe_ttm": [10.0, 20.0], "roe": [0.1, 0.2]})
-    assert cross_sectional_rank_with_direction(frame, "pe_ttm").tolist() == [1.0, 0.5]
-    assert cross_sectional_rank_with_direction(frame, "roe").tolist() == [0.5, 1.0]
-
-
-@pytest.mark.parametrize("direction", ["sideways", "", "REVERSE"])
-def test_factor_direction_rejects_unknown_values(direction: str) -> None:
-    factor = pd.Series([1.0, 2.0], name="roe")
-
-    with pytest.raises(ValueError, match="direction"):
-        apply_factor_direction(factor, direction=direction)
-    with pytest.raises(ValueError, match="direction"):
-        cross_sectional_rank_with_direction(
-            pd.DataFrame({"roe": factor}), "roe", direction=direction
-        )
-
-
-def test_annualized_sharpe_handles_empty_and_nonzero_returns() -> None:
-    assert annualized_sharpe(pd.Series(dtype=float)) == 0.0
-    returns = pd.Series([0.01, -0.01, 0.02, 0.0])
-    expected = returns.mean() * 252 / (returns.std() * np.sqrt(252))
-    assert annualized_sharpe(returns) == pytest.approx(expected)

tests/test_metrics.py

@@ -1,93 +0,0 @@
-"""Mathematical contracts for the standard performance metrics."""
-
-from __future__ import annotations
-
-import numpy as np
-import pandas as pd
-import pytest
-
-from quant_engine.metrics import (
-    TRADING_DAYS_PER_YEAR,
-    annualized_return,
-    annualized_volatility,
-    calmar_ratio,
-    max_drawdown,
-    sharpe_ratio,
-    summary,
-    win_rate,
-)
-
-
-def test_annualized_return_uses_compounded_simple_returns() -> None:
-    returns = pd.Series([0.10, -0.10])
-    expected = 0.99 ** (TRADING_DAYS_PER_YEAR / 2) - 1.0
-
-    assert annualized_return(returns) == pytest.approx(expected)
-
-
-def test_annualized_volatility_uses_sample_standard_deviation() -> None:
-    returns = pd.Series([0.01, 0.03, 0.02])
-
-    assert annualized_volatility(returns) == pytest.approx(
-        returns.std() * np.sqrt(TRADING_DAYS_PER_YEAR)
-    )
-
-
-def test_sharpe_ratio_subtracts_annual_risk_free_rate() -> None:
-    returns = pd.Series([0.01, -0.005, 0.02, 0.0])
-
-    result = sharpe_ratio(returns, rf=0.02)
-
-    assert result == pytest.approx(
-        (annualized_return(returns) - 0.02) / annualized_volatility(returns)
-    )
-
-
-def test_zero_volatility_metrics_return_zero() -> None:
-    returns = pd.Series([0.0, 0.0, 0.0])
-
-    assert sharpe_ratio(returns) == 0.0
-    assert calmar_ratio(returns) == 0.0
-
-
-def test_max_drawdown_includes_loss_from_initial_capital() -> None:
-    returns = pd.Series([-0.20, 0.0])
-
-    assert max_drawdown(returns) == pytest.approx(-0.20)
-
-
-def test_max_drawdown_tracks_peak_to_trough_loss() -> None:
-    returns = pd.Series([0.10, -0.20, 0.05])
-
-    assert max_drawdown(returns) == pytest.approx(-0.20)
-
-
-def test_metrics_clean_nan_and_infinite_values() -> None:
-    returns = pd.Series([0.10, np.nan, np.inf, -0.05, -np.inf])
-
-    assert win_rate(returns) == 0.5
-    assert summary(returns)["n_days"] == 2
-
-
-def test_summary_aliases_match_canonical_fields() -> None:
-    result = summary(pd.Series([0.01, -0.02, 0.03]))
-
-    assert result["annual_yield"] == result["ann_return"]
-    assert result["annual_sd"] == result["ann_volatility"]
-    assert result["drawback"] == result["max_drawdown"]
-
-
-@pytest.mark.parametrize(
-    "metric",
-    [annualized_return, annualized_volatility, sharpe_ratio, max_drawdown, calmar_ratio, win_rate],
-)
-def test_metrics_reject_non_series_input(metric) -> None:
-    with pytest.raises(TypeError, match=r"expected pd\.Series"):
-        metric([0.01, 0.02])
-
-
-def test_short_and_empty_series_return_zero() -> None:
-    assert annualized_return(pd.Series(dtype=float)) == 0.0
-    assert annualized_volatility(pd.Series([0.01])) == 0.0
-    assert max_drawdown(pd.Series([0.01])) == 0.0
-    assert win_rate(pd.Series(dtype=float)) == 0.0

tests/test_portfolio_construction.py

@@ -1,157 +0,0 @@
-"""Factor-score portfolio construction and backtest integration contracts."""
-
-from __future__ import annotations
-
-import numpy as np
-import pandas as pd
-import pytest
-
-from quant_engine.backtest import run_weight_backtest
-from quant_engine.portfolio_construction import (
-    equal_weight,
-    scores_to_target_weights,
-    scores_to_weight_table,
-    select_top_k,
-)
-
-
-def test_select_top_k_ignores_nan_and_breaks_ties_by_input_order() -> None:
-    scores = pd.Series([1.0, 1.0, np.nan, 0.5], index=["B", "A", "C", "D"])
-
-    selected = select_top_k(scores, top_k=2)
-
-    assert selected.tolist() == ["B", "A"]
-
-
-def test_select_top_k_can_select_lowest_scores() -> None:
-    scores = pd.Series([3.0, 1.0, 2.0], index=["A", "B", "C"])
-
-    selected = select_top_k(scores, top_k=2, largest=False)
-
-    assert selected.tolist() == ["B", "C"]
-
-
-def test_equal_weight_allocates_requested_gross_exposure() -> None:
-    result = equal_weight(pd.Index(["A", "B", "C"]), gross_exposure=0.9)
-
-    pd.testing.assert_series_equal(
-        result,
-        pd.Series([0.3, 0.3, 0.3], index=["A", "B", "C"], name="weight"),
-    )
-
-
-def test_equal_weight_returns_empty_float_series_for_no_assets() -> None:
-    result = equal_weight(pd.Index([], dtype=object))
-
-    assert result.empty
-    assert result.dtype == float
-    assert result.name == "weight"
-
-
-def test_scores_to_target_weights_keeps_full_universe_with_zero_for_unselected() -> None:
-    scores = pd.Series([0.2, 0.8, 0.5], index=["A", "B", "C"])
-
-    result = scores_to_target_weights(scores, top_k=2)
-
-    pd.testing.assert_series_equal(
-        result,
-        pd.Series([0.0, 0.5, 0.5], index=scores.index, name="weight"),
-    )
-
-
-def test_scores_to_target_weights_divides_exposure_over_available_scores() -> None:
-    scores = pd.Series([1.0, np.nan, 0.5], index=["A", "B", "C"])
-
-    result = scores_to_target_weights(scores, top_k=5, gross_exposure=0.8)
-
-    pd.testing.assert_series_equal(
-        result,
-        pd.Series([0.4, 0.0, 0.4], index=scores.index, name="weight"),
-    )
-
-
-def test_scores_to_weight_table_constructs_each_rebalance_independently() -> None:
-    dates = pd.to_datetime(["2026-01-05", "2026-01-07"])
-    scores = pd.DataFrame(
-        {"A": [3.0, 1.0], "B": [2.0, 3.0], "C": [1.0, 2.0]},
-        index=dates,
-    )
-
-    result = scores_to_weight_table(scores, top_k=2)
-
-    expected = pd.DataFrame(
-        {"A": [0.5, 0.0], "B": [0.5, 0.5], "C": [0.0, 0.5]},
-        index=dates,
-    )
-    pd.testing.assert_frame_equal(result, expected)
-
-    changed_future = scores.copy()
-    changed_future.iloc[1] = [100.0, -100.0, 0.0]
-    changed_result = scores_to_weight_table(changed_future, top_k=2)
-    pd.testing.assert_series_equal(result.iloc[0], changed_result.iloc[0])
-
-
-def test_effective_holding_weights_flow_into_weight_backtest() -> None:
-    dates = pd.date_range("2026-01-05", periods=3, freq="B")
-    effective_weights = pd.DataFrame(
-        {"A": [1.0, 0.0], "B": [0.0, 1.0]},
-        index=dates[[0, 2]],
-    )
-    stock_returns = pd.DataFrame(
-        {"A": [0.10, 0.0, 0.0], "B": [0.0, 0.0, 0.20]},
-        index=dates,
-    )
-
-    result = run_weight_backtest(effective_weights, stock_returns)
-
-    pd.testing.assert_series_equal(result.nav, pd.Series([1.1, 1.1, 1.32], index=dates))
-    pd.testing.assert_frame_equal(result.weights, effective_weights)
-
-
-@pytest.mark.parametrize("top_k", [0, -1])
-def test_portfolio_construction_rejects_non_positive_top_k(top_k: int) -> None:
-    scores = pd.Series([1.0], index=["A"])
-
-    with pytest.raises(ValueError, match="top_k must be positive"):
-        select_top_k(scores, top_k=top_k)
-
-
-@pytest.mark.parametrize("gross_exposure", [-0.1, np.inf, np.nan])
-def test_equal_weight_rejects_invalid_gross_exposure(gross_exposure: float) -> None:
-    with pytest.raises(ValueError, match="gross_exposure"):
-        equal_weight(pd.Index(["A"]), gross_exposure=gross_exposure)
-
-
-def test_portfolio_construction_rejects_duplicate_assets() -> None:
-    duplicate_scores = pd.Series([1.0, 2.0], index=["A", "A"])
-
-    with pytest.raises(ValueError, match="unique asset labels"):
-        scores_to_target_weights(duplicate_scores, top_k=1)
-
-
-def test_weight_table_rejects_duplicate_rebalance_dates() -> None:
-    duplicate_date = pd.Timestamp("2026-01-05")
-    scores = pd.DataFrame(
-        {"A": [1.0, 2.0]},
-        index=[duplicate_date, duplicate_date],
-    )
-
-    with pytest.raises(ValueError, match="unique rebalance dates"):
-        scores_to_weight_table(scores, top_k=1)
-
-
-def test_weight_table_rejects_unsorted_rebalance_dates() -> None:
-    scores = pd.DataFrame(
-        {"A": [1.0, 2.0]},
-        index=pd.to_datetime(["2026-01-07", "2026-01-05"]),
-    )
-
-    with pytest.raises(ValueError, match="chronological order"):
-        scores_to_weight_table(scores, top_k=1)
-
-
-def test_weight_table_rejects_non_numeric_scores() -> None:
-    scores = pd.DataFrame({"A": ["high"], "B": ["low"]})
-
-    with pytest.raises(TypeError, match="numeric"):
-        scores_to_weight_table(scores, top_k=1)

tests/test_research_pipeline.py

@@ -1,267 +0,0 @@
-"""No-lookahead factor-score to execution-audit integration contracts."""
-
-from __future__ import annotations
-
-import pandas as pd
-import pytest
-
-from quant_engine.execution import ExecutionConfig
-from quant_engine.research_pipeline import (
-    FactorBacktestResult,
-    FactorExecutionResult,
-    TargetWeightSchedule,
-    run_factor_backtest_research,
-    run_factor_execution_research,
-    schedule_target_weights,
-)
-
-
-def _calendar() -> pd.DatetimeIndex:
-    return pd.date_range("2026-01-05", periods=4, freq="B")
-
-
-def _factor_scores() -> pd.DataFrame:
-    dates = _calendar()
-    return pd.DataFrame(
-        {"A": [2.0, 0.0], "B": [1.0, 3.0]},
-        index=dates[:2],
-    )
-
-
-def _next_session_open_prices() -> pd.DataFrame:
-    dates = _calendar()
-    return pd.DataFrame(
-        {"A": [1.0, 10.0, 10.0, 10.0], "B": [1.0, 10.0, 20.0, 20.0]},
-        index=dates,
-    )
-
-
-def test_schedule_target_weights_maps_signal_to_next_trading_session() -> None:
-    dates = _calendar()
-    decision_weights = pd.DataFrame(
-        {"A": [1.0, 0.0], "B": [0.0, 1.0]},
-        index=dates[:2],
-    )
-
-    schedule = schedule_target_weights(decision_weights, dates, lag_sessions=1)
-
-    assert isinstance(schedule, TargetWeightSchedule)
-    assert schedule.lag_sessions == 1
-    pd.testing.assert_series_equal(
-        schedule.signal_to_execution,
-        pd.Series(dates[1:3], index=dates[:2], name="execution_date"),
-    )
-    expected = decision_weights.copy()
-    expected.index = dates[1:3]
-    expected.index.name = "execution_date"
-    pd.testing.assert_frame_equal(schedule.execution_weights, expected)
-    assert (schedule.execution_weights.index > schedule.signal_to_execution.index).all()
-
-
-def test_factor_execution_research_uses_next_session_prices() -> None:
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-
-    result = run_factor_execution_research(
-        _factor_scores(),
-        _next_session_open_prices(),
-        top_k=1,
-        execution_price_field="open",
-        initial_cash=1_000.0,
-        config=config,
-    )
-
-    assert isinstance(result, FactorExecutionResult)
-    assert result.execution_price_field == "open"
-    assert result.execution.daily_executions[0].date == str(_calendar()[1])
-    assert result.execution.positions[0].holdings == {"A": 100.0}
-    assert result.execution.positions[1].holdings == {"B": 50.0}
-    assert result.execution.final_portfolio_value == pytest.approx(1_000.0)
-
-
-def test_factor_execution_result_snapshots_research_inputs() -> None:
-    scores = _factor_scores()
-    prices = _next_session_open_prices()
-
-    result = run_factor_execution_research(
-        scores,
-        prices,
-        top_k=1,
-        execution_price_field="open",
-    )
-    scores.iloc[0, 0] = -999.0
-    prices.iloc[1, 0] = 999.0
-
-    assert result.factor_scores.iloc[0, 0] == 2.0
-    assert result.execution_prices.loc[_calendar()[1], "A"] == 10.0
-    assert result.execution.positions[0].holdings["A"] < 200_000.0
-
-
-@pytest.mark.parametrize("lag_sessions", [0, -1, True])
-def test_schedule_target_weights_requires_positive_integer_lag(lag_sessions: int) -> None:
-    with pytest.raises(ValueError, match="lag_sessions"):
-        schedule_target_weights(
-            pd.DataFrame({"A": [1.0]}, index=_calendar()[:1]),
-            _calendar(),
-            lag_sessions=lag_sessions,
-        )
-
-
-def test_schedule_target_weights_rejects_signal_outside_trading_calendar() -> None:
-    weekend = pd.Timestamp("2026-01-10")
-    with pytest.raises(ValueError, match="signal dates must be trading sessions"):
-        schedule_target_weights(
-            pd.DataFrame({"A": [1.0]}, index=[weekend]),
-            _calendar(),
-        )
-
-
-def test_schedule_target_weights_rejects_missing_future_execution_session() -> None:
-    dates = _calendar()
-    with pytest.raises(ValueError, match="future execution session"):
-        schedule_target_weights(
-            pd.DataFrame({"A": [1.0]}, index=dates[-1:]),
-            dates,
-        )
-
-
-def test_factor_execution_research_requires_explicit_price_field() -> None:
-    with pytest.raises(ValueError, match="execution_price_field"):
-        run_factor_execution_research(
-            _factor_scores(),
-            _next_session_open_prices(),
-            top_k=1,
-            execution_price_field="",
-        )
-
-
-def test_factor_execution_research_accepts_empty_scores() -> None:
-    scores = pd.DataFrame(columns=["A", "B"], index=pd.DatetimeIndex([]), dtype=float)
-
-    result = run_factor_execution_research(
-        scores,
-        _next_session_open_prices(),
-        top_k=1,
-        execution_price_field="open",
-    )
-
-    assert result.schedule.execution_weights.empty
-    assert result.execution.positions == ()
-
-
-def test_factor_backtest_research_runs_signal_to_daily_performance_without_lookahead() -> None:
-    """信号日保持现金，下一日开盘成交后才参与当日收盘收益。"""
-    dates = _calendar()
-    scores = pd.DataFrame({"A": [2.0], "B": [1.0]}, index=dates[:1])
-    opens = pd.DataFrame(
-        {"A": [1.0, 10.0, 10.0, 10.0], "B": [1.0, 20.0, 20.0, 20.0]},
-        index=dates,
-    )
-    closes = pd.DataFrame(
-        {"A": [500.0, 11.0, 12.0, 12.0], "B": [500.0, 20.0, 20.0, 20.0]},
-        index=dates,
-    )
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-
-    result = run_factor_backtest_research(
-        scores,
-        execution_prices=opens,
-        valuation_prices=closes,
-        top_k=1,
-        execution_price_field="open",
-        valuation_price_field="close",
-        initial_cash=1_000.0,
-        config=config,
-    )
-
-    assert isinstance(result, FactorBacktestResult)
-    assert result.execution_price_field == "open"
-    assert result.valuation_price_field == "close"
-    pd.testing.assert_series_equal(
-        result.nav,
-        pd.Series([1.0, 1.1, 1.2, 1.2], index=dates, name="nav"),
-    )
-    pd.testing.assert_series_equal(
-        result.returns,
-        pd.Series([0.0, 0.1, 1.2 / 1.1 - 1.0, 0.0], index=dates, name="returns"),
-    )
-    assert result.stats()["n_days"] == 4
-    assert result.execution.daily_executions[0].executions == ()
-    assert result.execution.daily_executions[1].executions[0].price == 10.0
-
-
-def test_factor_backtest_result_snapshots_both_price_semantics() -> None:
-    scores = pd.DataFrame({"A": [1.0]}, index=_calendar()[:1])
-    opens = pd.DataFrame({"A": [10.0, 10.0, 10.0, 10.0]}, index=_calendar())
-    closes = pd.DataFrame({"A": [10.0, 11.0, 12.0, 13.0]}, index=_calendar())
-
-    result = run_factor_backtest_research(
-        scores,
-        execution_prices=opens,
-        valuation_prices=closes,
-        top_k=1,
-        execution_price_field="open",
-        valuation_price_field="close",
-    )
-    opens.iloc[1, 0] = 999.0
-    closes.iloc[1, 0] = 999.0
-
-    assert result.execution_prices.iloc[1, 0] == 10.0
-    assert result.valuation_prices.iloc[1, 0] == 11.0
-
-
-def test_factor_backtest_research_requires_matching_daily_calendars() -> None:
-    scores = pd.DataFrame({"A": [1.0]}, index=_calendar()[:1])
-    opens = pd.DataFrame({"A": [10.0, 10.0, 10.0, 10.0]}, index=_calendar())
-    closes = pd.DataFrame({"A": [10.0, 11.0, 12.0]}, index=_calendar()[:3])
-
-    with pytest.raises(ValueError, match="matching trading calendars"):
-        run_factor_backtest_research(
-            scores,
-            execution_prices=opens,
-            valuation_prices=closes,
-            top_k=1,
-            execution_price_field="open",
-            valuation_price_field="close",
-        )
-
-
-def test_factor_backtest_starts_at_first_signal_instead_of_price_warmup() -> None:
-    """因子预热行情不能作为空仓日混入研究绩效区间。"""
-    dates = pd.date_range("2026-01-05", periods=5, freq="B")
-    scores = pd.DataFrame({"A": [1.0]}, index=dates[2:3])
-    opens = pd.DataFrame({"A": [1.0, 1.0, 1.0, 10.0, 10.0]}, index=dates)
-    closes = pd.DataFrame({"A": [100.0, 200.0, 300.0, 11.0, 12.0]}, index=dates)
-    config = ExecutionConfig(
-        commission_bps=0,
-        stamp_tax_bps=0,
-        slippage_bps=0,
-        min_trade_amount=0,
-    )
-
-    result = run_factor_backtest_research(
-        scores,
-        execution_prices=opens,
-        valuation_prices=closes,
-        top_k=1,
-        execution_price_field="open",
-        valuation_price_field="close",
-        initial_cash=1_000.0,
-        config=config,
-    )
-
-    assert result.nav.index.equals(dates[2:])
-    pd.testing.assert_series_equal(
-        result.nav,
-        pd.Series([1.0, 1.1, 1.2], index=dates[2:], name="nav"),
-    )
-    assert result.stats()["n_days"] == 3

tests/test_risk.py

@@ -1,54 +0,0 @@
-"""Risk contribution contracts and validation tests."""
-
-from __future__ import annotations
-
-import numpy as np
-import pytest
-
-from quant_engine.risk import component_var, marginal_risk_contribution, risk_contribution
-
-
-def test_risk_contribution_sums_to_one_for_positive_portfolio_variance() -> None:
-    weights = np.array([0.5, 0.5])
-    covariance = np.diag([1.0, 4.0])
-
-    result = risk_contribution(weights, covariance)
-
-    np.testing.assert_allclose(result, [0.2, 0.8])
-    assert result.sum() == pytest.approx(1.0)
-
-
-def test_zero_variance_portfolio_falls_back_to_equal_contribution() -> None:
-    result = risk_contribution(np.array([0.2, 0.3, 0.5]), np.zeros((3, 3)))
-
-    np.testing.assert_allclose(result, np.full(3, 1 / 3))
-
-
-def test_marginal_and_component_risk_follow_matrix_identities() -> None:
-    weights = np.array([0.25, 0.75])
-    covariance = np.array([[0.04, 0.01], [0.01, 0.09]])
-
-    marginal = marginal_risk_contribution(weights, covariance)
-    component = component_var(weights, covariance)
-
-    np.testing.assert_allclose(marginal, covariance @ weights)
-    np.testing.assert_allclose(component, weights * marginal)
-    assert component.sum() == pytest.approx(weights @ covariance @ weights)
-
-
-@pytest.mark.parametrize(
-    "function",
-    [risk_contribution, marginal_risk_contribution, component_var],
-)
-def test_risk_functions_reject_covariance_shape_mismatch(function) -> None:
-    with pytest.raises(ValueError, match="does not match weights length"):
-        function(np.array([0.5, 0.5]), np.eye(3))
-
-
-@pytest.mark.parametrize(
-    "function",
-    [risk_contribution, marginal_risk_contribution, component_var],
-)
-def test_risk_functions_reject_empty_portfolio(function) -> None:
-    with pytest.raises(ValueError, match="at least one asset"):
-        function(np.array([]), np.empty((0, 0)))

uv.lock

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