diff --git a/sanguo_portfolio/strategies/momentum_timing.py b/sanguo_portfolio/strategies/momentum_timing.py
index 0e7046f..6f4a9eb 100644
--- a/sanguo_portfolio/strategies/momentum_timing.py
+++ b/sanguo_portfolio/strategies/momentum_timing.py
@@ -95,6 +95,12 @@ class MomentumTimingStrategy:
         self.provider = provider
         self.broker = broker or BrokerFacade()
         self.config = config or MomentumTimingConfig()
+        # 当日预取缓存(层2向量化 #12):每日 1-2 次批量 SQL,替代原 ~13 次
+        # (10 行业 rps + buy_sign + select);失败/未启用 → None,各调用回退直查
+        self._day_panel: Optional[pd.DataFrame] = None
+        self._day_panel_end: Optional[str] = None
+        self._pool_cache: Optional[dict] = None
+        self._pool_cache_date: Optional[str] = None
 
     # =================== initialize ===================
     def initialize(self, context: Any) -> None:
@@ -138,7 +144,8 @@ class MomentumTimingStrategy:
         cur_date = _to_date_str(cur_dt)
         pre_date = _to_date_str(cur_dt - datetime.timedelta(days=cfg.past_day))
 
-        # 1) 牛熊分界
+        # 1) 牛熊分界(当日预取:先只拉指数点位;熊市日不付股票池全量 IO,同原行为)
+        self._ensure_day_panel(cfg.index_list, cur_date)
         buy_sign = self._cal_buy_sign(cfg.index_list, cfg.past_day, cur_date)
         logger.info("[%s] buy_sign=%s", cur_date, buy_sign)
 
@@ -151,7 +158,13 @@ class MomentumTimingStrategy:
                 self._close_position(stock)
             return
 
-        # 2) 牛市:取强舍弱(每行业 RPS top_k 并集) → 候选池
+        # 2) 牛市:当日预取十行业成份股池 close 宽表(层2向量化,每日 1 次批量 SQL)
+        union_stocks: List[str] = []
+        for each_index in cfg.index_list:
+            union_stocks.extend(self._stock_pool_cached(each_index, cur_date))
+        self._ensure_day_panel(union_stocks, cur_date)
+
+        # 3) 取强舍弱(每行业 RPS top_k 并集) → 候选池
         candidates = self._find_stock_pool(cfg.index_list, cur_date, pre_date)
 
         # 3) 均线动量过滤(close > MA_short > MA_long)
@@ -202,6 +215,72 @@ class MomentumTimingStrategy:
                     break
         logger.info("[%s] 牛市调仓结束: target=%s", cur_date, stocks)
 
+    # =================== 当日预取缓存(层2向量化 #12) ===================
+    def _ensure_day_panel(self, symbols: List[str], cur_date: str) -> None:
+        """确保当日预取宽表覆盖 ``symbols``(增量补列;跨日自动重置)。
+
+        预取窗口 = cur - max(past_day, ma_long)*2 自然日(覆盖 _cal_buy_sign/
+        _cal_rps/_select_stocks 三者最大窗口)。失败 → 保持原状,各调用回退直查
+        (行为等价旧版,只是慢)。
+        """
+        if self._day_panel_end != cur_date or self._day_panel is None:
+            self._day_panel = pd.DataFrame()
+            self._day_panel_end = cur_date
+        p = self._day_panel
+        missing = [s for s in symbols if s not in p.columns]
+        if not missing:
+            return
+        span = max(self.config.past_day, self.config.ma_long) * 2
+        start = _shift_date(cur_date, -span)
+        try:
+            chunk = self.provider.get_closes_panel(
+                _dedup(missing), start, cur_date, fq="raw",
+            )
+        except Exception as exc:
+            logger.warning("预取 get_closes_panel 失败(回退逐调用直查): %s", exc)
+            return
+        if chunk is None or chunk.empty:
+            return
+        self._day_panel = chunk if p.empty else p.join(chunk, how="outer")
+
+    def _panel_slice(
+        self,
+        symbols: List[str],
+        start_date: str,
+        end_date: str,
+    ) -> Optional[pd.DataFrame]:
+        """从当日预取宽表切 ``[start_date, end_date] × symbols``。
+
+        不可用(无预取/请求符号全不在列/切片空/异常)→ ``None``,调用方回退
+        provider 直查(等价旧行为;生产场景预取窗口必覆盖,回退仅异常时触发)。
+        缺失符号列直接剔除(=provider 版该列全 NaN → 下游 dropna/notna 剔除,
+        语义一致)。
+        """
+        p = self._day_panel
+        if self._day_panel_end is None or p is None or p.empty:
+            return None
+        cols = [s for s in symbols if s in p.columns]
+        if not cols:
+            return None
+        try:
+            sub = p.loc[start_date:end_date, cols]
+        except Exception:
+            return None
+        # dropna(how="all") 复刻 provider 直查行集语义:其 panel 行 = 该查询组内
+        # 任一 symbol 有 bar 的日期(超集切片会带进组外日期的全 NaN 行,改变
+        # iloc[0]/tail(N) 口径)。剔除后与直查逐值一致。
+        sub = sub.dropna(how="all")
+        return sub if not sub.empty else None
+
+    def _stock_pool_cached(self, index_symbol: str, cur_date: str) -> List[str]:
+        """_stock_pool 当日缓存(同日 10 行业并集预取 + _find_stock_pool 复用)。"""
+        if self._pool_cache_date != cur_date or self._pool_cache is None:
+            self._pool_cache = {}
+            self._pool_cache_date = cur_date
+        if index_symbol not in self._pool_cache:
+            self._pool_cache[index_symbol] = self._stock_pool(index_symbol, cur_date)
+        return self._pool_cache[index_symbol]
+
     # =================== calRPS (修复:取 preDate~curDate 区间) ===================
     def _cal_rps(
         self,
@@ -225,15 +304,20 @@ class MomentumTimingStrategy:
         n = len(stocks)
         if n == 0:
             return pd.DataFrame({"code": [], "rps_value": []})
-        try:
-            panel = self.provider.get_closes_panel(
-                stocks, pre_date, cur_date, fq="raw",
-            )
-        except Exception as exc:
-            logger.warning("_cal_rps get_closes_panel 失败: %s", exc)
-            return pd.DataFrame({"code": [], "rps_value": []})
-        if panel is None or panel.empty or len(panel) < 2:
-            return pd.DataFrame({"code": [], "rps_value": []})
+        panel = self._panel_slice(stocks, pre_date, cur_date)
+        if panel is not None:
+            if panel.empty or len(panel) < 2:
+                return pd.DataFrame({"code": [], "rps_value": []})
+        else:
+            try:
+                panel = self.provider.get_closes_panel(
+                    stocks, pre_date, cur_date, fq="raw",
+                )
+            except Exception as exc:
+                logger.warning("_cal_rps get_closes_panel 失败: %s", exc)
+                return pd.DataFrame({"code": [], "rps_value": []})
+            if panel is None or panel.empty or len(panel) < 2:
+                return pd.DataFrame({"code": [], "rps_value": []})
 
         # 每只股票涨跌幅(末值/首值 - 1) — 向量化
         first = panel.iloc[0]
@@ -265,7 +349,7 @@ class MomentumTimingStrategy:
         cfg = self.config
         out: List[str] = []
         for each_index in index_list:
-            stocks = self._stock_pool(each_index, cur_date)
+            stocks = self._stock_pool_cached(each_index, cur_date)
             if not stocks:
                 continue
             rps_df = self._cal_rps(stocks, cur_date, pre_date)
@@ -288,13 +372,15 @@ class MomentumTimingStrategy:
         if not stocks:
             return []
         start_date = _shift_date(cur_date, -cfg.ma_long * 2)
-        try:
-            panel = self.provider.get_closes_panel(
-                stocks, start_date, cur_date, fq="raw",
-            )
-        except Exception as exc:
-            logger.warning("_select_stocks get_closes_panel 失败: %s", exc)
-            return []
+        panel = self._panel_slice(stocks, start_date, cur_date)
+        if panel is None:
+            try:
+                panel = self.provider.get_closes_panel(
+                    stocks, start_date, cur_date, fq="raw",
+                )
+            except Exception as exc:
+                logger.warning("_select_stocks get_closes_panel 失败: %s", exc)
+                return []
         if panel is None or panel.empty:
             return []
         panel = panel.tail(cfg.ma_long)
@@ -340,13 +426,15 @@ class MomentumTimingStrategy:
         if not index_list:
             return False
         start_date = _shift_date(cur_date, -past_day * 2)
-        try:
-            panel = self.provider.get_closes_panel(
-                index_list, start_date, cur_date, fq="raw",
-            )
-        except Exception as exc:
-            logger.warning("_cal_buy_sign get_closes_panel 失败: %s", exc)
-            return False
+        panel = self._panel_slice(index_list, start_date, cur_date)
+        if panel is None:
+            try:
+                panel = self.provider.get_closes_panel(
+                    index_list, start_date, cur_date, fq="raw",
+                )
+            except Exception as exc:
+                logger.warning("_cal_buy_sign get_closes_panel 失败: %s", exc)
+                return False
         if panel is None or panel.empty:
             return False
         panel = panel.tail(past_day)
diff --git a/tests/portfolio/test_momentum_timing.py b/tests/portfolio/test_momentum_timing.py
index 8205363..3d9f96a 100644
--- a/tests/portfolio/test_momentum_timing.py
+++ b/tests/portfolio/test_momentum_timing.py
@@ -395,6 +395,49 @@ class TestHandleData:
         assert len(buy_calls) >= 1
         assert any(c.args[0] == "CAND.XSHG" for c in buy_calls)
 
+    def test_bull_day_single_prefetch_queries(self):
+        """#12 层2向量化:牛市全流程 provider.get_closes_panel ≤2 次
+        (指数预取 + 股票池预取;原每日 ~13 次),get_index_stocks 每行业仅 1 次
+        (_stock_pool 当日缓存,_find_stock_pool 复用)。
+        """
+        cfg = MomentumTimingConfig(
+            index_list=["IDX1.XSHG", "IDX2.XSHG"], top_k=6,
+            ma_short=5, ma_long=15,
+        )
+        s = make_strategy(
+            index_stocks_map={
+                "IDX1.XSHG": ["A.XSHG"], "IDX2.XSHG": ["B.XSHG"],
+            },
+            config=cfg,
+        )
+        panel_calls: List[Any] = []
+
+        def _gcp(symbols, start=None, end=None, interval="d", fq="raw"):
+            panel_calls.append(list(symbols) if isinstance(symbols, list) else symbols)
+            syms = list(symbols)
+            if all(s.startswith("IDX") for s in syms):
+                return _make_close_wide(syms, [[20.0 + i for i in range(30)]] * len(syms), days=30)
+            return _make_close_wide(syms, [[10.0 + i for i in range(15)]] * len(syms), days=15)
+
+        s.provider.get_closes_panel.side_effect = _gcp
+        ctx = FakeContext(
+            current_dt=datetime(2024, 10, 8, 9, 30),
+            previous_date="2024-09-30", positions={}, cash=1_000_000,
+        )
+        s.handle_data(ctx)
+        # 预取收敛:牛市日 ≤2 次批量 SQL(原 1 buy_sign + 10 rps + 1-2 select ≈13)
+        assert len(panel_calls) <= 2, panel_calls
+        # _stock_pool 缓存:每行业 get_index_stocks 只查 1 次(handle_data 预取
+        # + _find_stock_pool 复用)
+        idx_calls = [
+            c for c in s.provider.get_index_stocks.call_args_list
+            if c.args and str(c.args[0]).startswith("IDX")
+        ]
+        assert len(idx_calls) == 2, idx_calls
+        # 全流程仍有买入(链路活)
+        buys = [c for c in s.broker.order_target_value.call_args_list if c.args[1] != 0]
+        assert buys
+
     def test_handle_data_uses_current_dt_not_today(self):
         """⚠️ 修复原始 bug 验证:handle_data 必须用 context.current_dt 计算 cur_date,
         不能用 datetime.date.today()(后者取真实今天)。