diff --git a/backend/alembic/versions/0007_add_portfolio_market_column.py b/backend/alembic/versions/0007_add_portfolio_market_column.py
new file mode 100644
index 0000000..39d97f4
--- /dev/null
+++ b/backend/alembic/versions/0007_add_portfolio_market_column.py
@@ -0,0 +1,26 @@
+"""add market column to portfolio table
+
+Revision ID: 0007
+Revises: 0006
+Create Date: 2026-04-01
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "0007"
+down_revision = "0006"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "portfolio",
+        sa.Column("market", sa.String(10), nullable=True, server_default="KRX"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("portfolio", "market")