diff --git a/backend/data/datahub/realtime_proxy.py b/backend/data/datahub/realtime_proxy.py
index c5aa85e..5c758a2 100644
--- a/backend/data/datahub/realtime_proxy.py
+++ b/backend/data/datahub/realtime_proxy.py
@@ -22,8 +22,7 @@ class HubRealtimeProxy:
         except RealtimeAggregateError as exc:
             error = str(exc)
         epochs = [int(item.get("quote_time_epoch") or 0) for item in indices]
-        now = datetime.now().astimezone()
-        max_skew = 120 if now.hour >= 15 else 15
+        max_skew = 120
         index_consistent = bool(epochs) and max(epochs) - min(epochs) <= max_skew
         ready = len(indices) == 3 and index_consistent
         return {
diff --git a/backend/data/providers/tushare_dashboard.py b/backend/data/providers/tushare_dashboard.py
index b55ca7a..19ffebb 100644
--- a/backend/data/providers/tushare_dashboard.py
+++ b/backend/data/providers/tushare_dashboard.py
@@ -368,6 +368,11 @@ class DashboardMixin:
             basic = basics[0] if basics else {}
         capital = self._latest_capital(ts_code, reference_date)
         float_share = _number(capital.get("float_share"))
+        if not float_share and previous_close:
+            # The hub's canonical valuation table stores market values but not
+            # share counts. circ_mv (10k CNY) / price (CNY) is float shares in
+            # 10k shares, the same unit used by the turnover formula below.
+            float_share = _number(capital.get("circ_mv")) / previous_close
         # rt_k volume is shares; daily_basic float_share is reported in 10k shares.
         turnover_rate = _number(row.get("vol")) / float_share / 100 if float_share else 0
         market_date = reference_date or datetime.now().astimezone().strftime("%Y%m%d")
@@ -389,6 +394,13 @@ class DashboardMixin:
         for item in market_rows:
             item_capital = capital_map.get(str(item.get("ts_code") or ""), {})
             item_float_share = _number(item_capital.get("float_share"))
+            item_previous = _number(
+                item.get("pre_close")
+                if item.get("pre_close") not in (None, "")
+                else item.get("previous_close")
+            )
+            if not item_float_share and item_previous:
+                item_float_share = _number(item_capital.get("circ_mv")) / item_previous
             if item_float_share:
                 market_turnovers.append(_number(item.get("vol")) / item_float_share / 100)
         market_turnover = (
diff --git a/backend/data/providers/tushare_industries.py b/backend/data/providers/tushare_industries.py
index 1dca38c..bbecaeb 100644
--- a/backend/data/providers/tushare_industries.py
+++ b/backend/data/providers/tushare_industries.py
@@ -541,6 +541,13 @@ class ShenwanIndustryMixin:
         for item in valid:
             capital = capital_map.get(str(item.get("ts_code") or ""), {})
             float_share = _number(capital.get("float_share"))
+            previous = _number(
+                item.get("pre_close")
+                if item.get("pre_close") not in (None, "")
+                else item.get("previous_close")
+            )
+            if not float_share and previous:
+                float_share = _number(capital.get("circ_mv")) / previous
             volume = _number(item.get("vol"))
             if float_share and volume:
                 # 免费源成交量为股；daily_basic.float_share 为万股。
@@ -549,6 +556,13 @@ class ShenwanIndustryMixin:
         for item in market_rows:
             capital = capital_map.get(str(item.get("ts_code") or ""), {})
             float_share = _number(capital.get("float_share"))
+            previous = _number(
+                item.get("pre_close")
+                if item.get("pre_close") not in (None, "")
+                else item.get("previous_close")
+            )
+            if not float_share and previous:
+                float_share = _number(capital.get("circ_mv")) / previous
             volume = _number(item.get("vol"))
             if float_share and volume:
                 market_turnovers.append(volume / float_share / 100)
diff --git a/backend/features/heaven/market_context.py b/backend/features/heaven/market_context.py
index 5715e4d..359bb17 100644
--- a/backend/features/heaven/market_context.py
+++ b/backend/features/heaven/market_context.py
@@ -202,8 +202,7 @@ class HeavenMarketContextMixin:
         }
         if len(quotes) != 3 or quote_dates != {trade_date}:
             raise ValueError("腾讯三大指数日期与目标交易日不一致")
-        now = datetime.now().astimezone()
-        max_skew = 120 if now.hour >= 15 else 15
+        max_skew = 120
         if max(epochs) - min(epochs) > max_skew:
             raise ValueError(f"腾讯三大指数时间差超过{max_skew}秒")
 
diff --git a/config/architecture-inventory.json b/config/architecture-inventory.json
index 751c516..4a2b663 100644
--- a/config/architecture-inventory.json
+++ b/config/architecture-inventory.json
@@ -483,8 +483,8 @@
     },
     {
       "path": "backend/data/providers/tushare_industries.py",
-      "bytes": 37168,
-      "lines": 859
+      "bytes": 37786,
+      "lines": 873
     },
     {
       "path": "backend/features/screener/catalog.py",
@@ -498,8 +498,8 @@
     },
     {
       "path": "backend/data/providers/tushare_dashboard.py",
-      "bytes": 34082,
-      "lines": 785
+      "bytes": 34777,
+      "lines": 797
     },
     {
       "path": "database.py",
@@ -568,8 +568,8 @@
     },
     {
       "path": "backend/features/heaven/market_context.py",
-      "bytes": 14535,
-      "lines": 357
+      "bytes": 14467,
+      "lines": 356
     },
     {
       "path": "frontend/shared/session.js",