diff --git a/src/trading_bot/ui/dashboard.py b/src/trading_bot/ui/dashboard.py
index bfeddba..9cd985f 100644
--- a/src/trading_bot/ui/dashboard.py
+++ b/src/trading_bot/ui/dashboard.py
@@ -533,17 +533,13 @@ def render_dashboard(snapshot: DashboardSnapshot) -> str:
         if snapshot.warning
         else ""
     )
-    latest_account_value = (
-        snapshot.performance[-1].account_value
-        if snapshot.performance
-        else sum(row.market_value for row in snapshot.portfolio)
-    )
+    current_portfolio_value = sum(row.market_value for row in snapshot.portfolio)
     portfolio_rows = "\n".join(
         "<tr>"
         f"<td>{escape(row.symbol)}</td>"
         f"<td>{_format_number(row.quantity)}</td>"
         f"<td>{_format_currency(row.market_value)}</td>"
-        f"<td>{_format_percent(row.market_value / latest_account_value if latest_account_value else None)}</td>"
+        f"<td>{_format_percent(row.market_value / current_portfolio_value if current_portfolio_value else None)}</td>"
         f"<td>{_format_currency(row.average_entry_price)}</td>"
         f"<td>{_format_currency(row.current_price)}</td>"
         f"<td>{_format_currency(row.unrealized_pl)}</td>"
diff --git a/tests/test_dashboard.py b/tests/test_dashboard.py
index 571e96a..f349d58 100644
--- a/tests/test_dashboard.py
+++ b/tests/test_dashboard.py
@@ -139,3 +139,22 @@ def test_render_dashboard_contains_requested_sections() -> None:
     assert "FILLED</span>" in html
     assert "orderside.sell" not in html
     assert "orderstatus.filled" not in html
+
+
+def test_portfolio_percentage_uses_current_portfolio_total() -> None:
+    html = render_dashboard(
+        DashboardSnapshot(
+            refreshed_at=datetime(2026, 8, 11, 10, 0, tzinfo=UTC),
+            performance=[
+                PerformancePoint(date(2026, 8, 11), 10_000.0, 10_000.0),
+            ],
+            portfolio=[
+                PortfolioRow("CASH", "cash", None, 100.0, None, None, None),
+                PortfolioRow("SPY", "us_equity", 10.0, 10_000.0, 900.0, 1_000.0, 1_000.0),
+            ],
+            trades=[],
+        )
+    )
+
+    assert "99.01%" in html
+    assert "100.00%" not in html