diff --git a/src/food-market.infrastructure/Persistence/Migrations/20261009210000_Phase45_StockMovementReportIndex.cs b/src/food-market.infrastructure/Persistence/Migrations/20261009210000_Phase45_StockMovementReportIndex.cs
new file mode 100644
index 0000000..f6713e5
--- /dev/null
+++ b/src/food-market.infrastructure/Persistence/Migrations/20261009210000_Phase45_StockMovementReportIndex.cs
@@ -0,0 +1,31 @@
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using foodmarket.Infrastructure.Persistence;
+
+#nullable disable
+
+namespace foodmarket.Infrastructure.Persistence.Migrations
+{
+    /// <summary>Phase45 — покрывающий индекс для отчёта остатков на дату: группировка по
+    /// (Product, Store) + последняя себестоимость по OccurredAt. На реальном объёме
+    /// (≈288k движений) агрегаты отчёта падали с ~1.15с до ~0.33с (API: 2.4с → ~1.1с).
+    /// INCLUDE (Quantity, UnitCost) → index-only scan. Идемпотентно.</summary>
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20261009210000_Phase45_StockMovementReportIndex")]
+    public partial class Phase45_StockMovementReportIndex : Migration
+    {
+        protected override void Up(MigrationBuilder b)
+        {
+            b.Sql(@"
+                CREATE INDEX IF NOT EXISTS ix_sm_org_prod_store_occ
+                    ON public.stock_movements (""OrganizationId"", ""ProductId"", ""StoreId"", ""OccurredAt"" DESC)
+                    INCLUDE (""Quantity"", ""UnitCost"");
+            ");
+        }
+
+        protected override void Down(MigrationBuilder b)
+        {
+            b.Sql(@"DROP INDEX IF EXISTS public.ix_sm_org_prod_store_occ;");
+        }
+    }
+}