diff --git a/src/tools/portfolio.ts b/src/tools/portfolio.ts
index 406d74a..5446023 100644
--- a/src/tools/portfolio.ts
+++ b/src/tools/portfolio.ts
@@ -18,34 +18,41 @@ async function lastClose(ticker: string): Promise<number | null> {
 
 export async function shapeBrokerPortfolio(
   snap: BrokerSnapshot,
-  priceFor: (ticker: string) => Promise<number | null>,
+  priceFor: (tickers: string[]) => Promise<Record<string, number | null>>,
 ) {
-  const positions = await Promise.all(
-    snap.positions.map(async (p) => {
-      const px = p.lastPrice ?? await priceFor(p.ticker);
-      const cost_basis_vnd = p.avgCost * p.quantity * 1000;
-      const market_value_vnd = p.marketValueVnd ?? (px != null ? px * p.quantity * 1000 : null);
-      const unrealized_pnl_vnd =
-        p.unrealizedPnlVnd ?? (px != null ? (px - p.avgCost) * p.quantity * 1000 : null);
-      const unrealized_pnl_pct =
-        p.unrealizedPnlPct ?? (px != null && p.avgCost > 0
-          ? ((px - p.avgCost) / p.avgCost) * 100
-          : null);
-      return {
-        ticker: p.ticker,
-        quantity: p.quantity,
-        sub_account_id: p.subAccountId ?? null,
-        custody_code: p.custodyCode ?? null,
-        avg_cost_thousand_vnd: p.avgCost,
-        last_close_thousand_vnd: px,
-        cost_basis_vnd,
-        market_value_vnd,
-        unrealized_pnl_vnd,
-        unrealized_pnl_pct,
-      };
-    }),
+  const tickersNeedingPrice = Array.from(
+    new Set(snap.positions.filter((p) => p.lastPrice == null).map((p) => p.ticker)),
   );
 
+  let fetchedPrices: Record<string, number | null> = {};
+  if (tickersNeedingPrice.length > 0) {
+    fetchedPrices = await priceFor(tickersNeedingPrice);
+  }
+
+  const positions = snap.positions.map((p) => {
+    const px = p.lastPrice ?? fetchedPrices[p.ticker] ?? null;
+    const cost_basis_vnd = p.avgCost * p.quantity * 1000;
+    const market_value_vnd = p.marketValueVnd ?? (px != null ? px * p.quantity * 1000 : null);
+    const unrealized_pnl_vnd =
+      p.unrealizedPnlVnd ?? (px != null ? (px - p.avgCost) * p.quantity * 1000 : null);
+    const unrealized_pnl_pct =
+      p.unrealizedPnlPct ?? (px != null && p.avgCost > 0
+        ? ((px - p.avgCost) / p.avgCost) * 100
+        : null);
+    return {
+      ticker: p.ticker,
+      quantity: p.quantity,
+      sub_account_id: p.subAccountId ?? null,
+      custody_code: p.custodyCode ?? null,
+      avg_cost_thousand_vnd: p.avgCost,
+      last_close_thousand_vnd: px,
+      cost_basis_vnd,
+      market_value_vnd,
+      unrealized_pnl_vnd,
+      unrealized_pnl_pct,
+    };
+  });
+
   const totals = positions.reduce(
     (a, p) => {
       a.cost_basis_vnd += p.cost_basis_vnd;
@@ -76,6 +83,11 @@ export const listPositionsTool = tool(
     const ok = await requireBrokerConsent("portfolio_list", "read cash, positions, and exposure");
     if (!ok) return asText({ ok: false, error: "user_declined" });
     const snap = await getBroker().snapshot();
-    return asText(await shapeBrokerPortfolio(snap, lastClose));
+    return asText(
+      await shapeBrokerPortfolio(snap, async (tickers: string[]) => {
+        const prices = await Promise.all(tickers.map((t) => lastClose(t)));
+        return Object.fromEntries(tickers.map((t, i) => [t, prices[i] ?? null]));
+      })
+    );
   },
 );
diff --git a/test-batch-dnse.ts b/test-batch-dnse.ts
new file mode 100644
index 0000000..04fffa9
--- /dev/null
+++ b/test-batch-dnse.ts
@@ -0,0 +1,13 @@
+import { request } from "undici";
+
+async function fetchOhlcs(symbol: string) {
+  const url = `https://services.entrade.com.vn/chart-api/v2/ohlcs/stock?symbol=${encodeURIComponent(
+    symbol,
+  )}&resolution=1D&from=1700000000&to=1800000000`;
+  const { statusCode, body } = await request(url, {
+    method: "GET",
+    headers: { accept: "application/json" },
+  });
+  console.log(statusCode, await body.text());
+}
+fetchOhlcs("FPT,SSI");
diff --git a/test-ssi-batch.ts b/test-ssi-batch.ts
new file mode 100644
index 0000000..45301f5
--- /dev/null
+++ b/test-ssi-batch.ts
@@ -0,0 +1,11 @@
+import { request } from "undici";
+
+async function fetchSsi(symbol: string) {
+  const url = `https://iboard-query.ssi.com.vn/stock/${encodeURIComponent(symbol)}`;
+  const { statusCode, body } = await request(url, {
+    method: "GET",
+    headers: { accept: "application/json" },
+  });
+  console.log(statusCode, await body.text());
+}
+fetchSsi("FPT,SSI");
diff --git a/tests/portfolio.test.ts b/tests/portfolio.test.ts
index 2e2e037..0bc80bc 100644
--- a/tests/portfolio.test.ts
+++ b/tests/portfolio.test.ts
@@ -9,7 +9,7 @@ describe("portfolio units", () => {
         cashVnd: 1_000_000,
         positions: [{ ticker: "FPT", quantity: 100, avgCost: 25 }],
       },
-      async () => 30,
+      async (tickers) => Object.fromEntries(tickers.map(t => [t, 30])),
     );
 
     expect(shaped.cash_vnd).toBe(1_000_000);