diff --git a/backend/app/cli/sync.py b/backend/app/cli/sync.py
index 6bd16f2..930ba98 100644
--- a/backend/app/cli/sync.py
+++ b/backend/app/cli/sync.py
@@ -91,21 +91,34 @@ def _symbols_of(args) -> list[str]:
 
 
 def cmd_daily(args) -> int:
+    from sqlalchemy import func
+
+    from app.infrastructure.persistence.sqlalchemy.models.market import StockDailyModel
+
     symbols = _symbols_of(args)
     start = _parse_day(args.start) if args.start else date(2005, 1, 1)
     end = _parse_day(args.end) if args.end else date.today()
     total = 0
+    skipped = 0
     with _session_ctx() as session:
         provider = _failover_provider(session)
         bar_repo = SqlAlchemyDailyBarRepository(session)
         factor_repo = SqlAlchemyAdjustFactorRepository(session)
+        # 增量基准：本地数据已到该日期即视为「已最新」，resume 时不再调 API
+        global_latest = (
+            session.scalar(select(func.max(StockDailyModel.trade_date))) if args.resume else None
+        )
         for i, symbol in enumerate(symbols, start=1):
             begin = start
             if args.resume:
                 latest = bar_repo.latest_date(symbol)
                 if latest is not None:
+                    if global_latest is not None and latest >= global_latest:
+                        skipped += 1  # 已同步到本地最新交易日，无需续拉
+                        continue
                     begin = max(begin, latest + timedelta(days=1))
                 if begin > end:
+                    skipped += 1  # 无待拉区间（如区间已含在本地）
                     continue
             try:
                 bars = provider.get_daily(symbol, begin, end)
@@ -119,7 +132,10 @@ def cmd_daily(args) -> int:
             except DataSourceError as exc:
                 print(f"  [warn] {symbol} 拉取失败: {exc}", file=sys.stderr)
         session.commit()
-    print(f"[daily] {len(symbols)} 只股票合计写入 {total} 根日线（含复权因子）")
+    detail = f"[daily] {len(symbols)} 只股票合计写入 {total} 根日线（含复权因子）"
+    if args.resume:
+        detail += f"；增量跳过（已最新）{skipped} 只（本地最新 {global_latest}）"
+    print(detail)
     return 0