diff --git a/scripts/data_platform/ak_stock_wrapper.ps1 b/scripts/data_platform/ak_stock_wrapper.ps1
index a750053..3a0ea1b 100644
--- a/scripts/data_platform/ak_stock_wrapper.ps1
+++ b/scripts/data_platform/ak_stock_wrapper.ps1
@@ -1,8 +1,10 @@
 # ak_stock_wrapper.ps1 — sanguo-ak-weekly schtask wrapper (weekly 周六03:00 akshare per-stock 慢)
-# --force 全量刷新; 顺序=gdhs,share_capital,top_holders,northbound (09-06 调序:
-#   09-05 northbound 1117/2883 无数据标的连败触发断路器, 饿死后续 3 类型——
-#   最大最险的 northbound 挪最后, 即使再断路也不连累前面);
+# --force 全量刷新; 顺序=gdhs,share_capital,top_holders (09-06 调序把最大最险的挪最后;
+#   2026-09-12 移除 northbound: EM 沪深港通个股持股 2024-08 后已全量下线,
+#   每周六 2883 单位全空跑纯烧时——北向改 HKEX 官方渠道, 见融合 spec §20.4);
 # gdhs=股东户数 per-period 全市场单次 (09-02 入列, 披露守卫>90天季度末, marker 去重无新期零网络)
+# margin 回补兜底 (2026-09-12 §20): 深北段 TMC 只保留最近两日块, nightly
+#   T-2~T 窗漏的旧缺口每周六整段翻页幂等补齐 (state 断点续传)
 $env:http_proxy = ''
 $env:https_proxy = ''
 $env:all_proxy = ''
@@ -11,5 +13,9 @@ $ts = Get-Date -Format 'yyyyMMdd_HHmmss'
 $logDir = 'C:\sanguo_vnpy_v2\data\migration_logs'
 if (-not (Test-Path $logDir)) { New-Item -ItemType Directory -Path $logDir -Force | Out-Null }
 $log = Join-Path $logDir "ak_stock_$ts.txt"
-C:\Python310\python.exe -X utf8 C:\sanguo_vnpy_v2\scripts\data_platform\akshare_static_download.py --types gdhs,share_capital,top_holders,northbound --force *>> $log
-exit $LASTEXITCODE
+C:\Python310\python.exe -X utf8 C:\sanguo_vnpy_v2\scripts\data_platform\akshare_static_download.py --types gdhs,share_capital,top_holders --force *>> $log
+$rc1 = $LASTEXITCODE
+$bfLog = Join-Path $logDir "margin_backfill_$ts.txt"
+C:\Python310\python.exe -X utf8 C:\sanguo_vnpy_v2\scripts\data_platform\akshare_static_download.py --margin-backfill *>> $bfLog
+$rc2 = $LASTEXITCODE
+if ($rc1 -ne 0 -or $rc2 -ne 0) { exit 1 } else { exit 0 }