diff --git a/web/app/[code]/page.tsx b/web/app/[code]/page.tsx
index 3a8290d..bd3a95b 100644
--- a/web/app/[code]/page.tsx
+++ b/web/app/[code]/page.tsx
@@ -12,7 +12,7 @@ import { PeerComparePanel } from "../../components/PeerComparePanel";
 import { NewsList } from "../../components/NewsList";
 import { OrderbookPanel } from "../../components/OrderbookPanel";
 import { PeriodReturns } from "../../components/PeriodReturns";
-import { PeriodTabs, periodSpec, type Period } from "../../components/PeriodTabs";
+import { PeriodTabs, periodNeighbor, periodSpec, type Period } from "../../components/PeriodTabs";
 import { PredictionPanel } from "../../components/PredictionPanel";
 import { PriceHero } from "../../components/PriceHero";
 import { PriceTargets } from "../../components/PriceTargets";
@@ -25,6 +25,7 @@ import { TradingValuePanel } from "../../components/TradingValuePanel";
 import { api, type ChartPayload, type LatestPredictionResponse } from "../../lib/api";
 import { recent } from "../../lib/recent";
 import { readTargets, type Targets } from "../../lib/targets";
+import { watchlist } from "../../lib/watchlist";
 import { markRecorded, wasRecordedToday } from "../../lib/views";
 
 export default function CodePage({ params }: { params: { code: string } }) {
@@ -78,6 +79,38 @@ export default function CodePage({ params }: { params: { code: string } }) {
     setTargets(readTargets(code));
   }, [code]);
 
+  // 종목 페이지 키보드 단축키:
+  //   ←/→ : 기간 탭 이전/다음 (양끝 clamp — wrap 안 함, 사용자가 끝 인지)
+  //   S   : 관심종목 토글
+  // 입력 필드(검색창, 메모 등) 포커스 시 무시 — 텍스트 편집 방해 금지.
+  // modifier(Ctrl/Cmd/Alt) 가 눌리면 브라우저/OS 단축키 양보.
+  useEffect(() => {
+    if (typeof window === "undefined") return;
+    const isEditableTarget = (t: EventTarget | null): boolean => {
+      if (!(t instanceof HTMLElement)) return false;
+      const tag = t.tagName;
+      if (tag === "INPUT" || tag === "TEXTAREA" || tag === "SELECT") return true;
+      if (t.isContentEditable) return true;
+      return false;
+    };
+    const onKey = (e: KeyboardEvent) => {
+      if (e.ctrlKey || e.metaKey || e.altKey) return;
+      if (isEditableTarget(e.target)) return;
+      if (e.key === "ArrowLeft") {
+        e.preventDefault();
+        setPeriod((cur) => periodNeighbor(cur, -1));
+      } else if (e.key === "ArrowRight") {
+        e.preventDefault();
+        setPeriod((cur) => periodNeighbor(cur, 1));
+      } else if (e.key === "s" || e.key === "S") {
+        e.preventDefault();
+        watchlist.toggle(code);
+      }
+    };
+    window.addEventListener("keydown", onKey);
+    return () => window.removeEventListener("keydown", onKey);
+  }, [code]);
+
   useEffect(() => {
     let alive = true;
     setErr(null);
diff --git a/web/components/PeriodTabs.tsx b/web/components/PeriodTabs.tsx
index 276a40d..3cd5489 100644
--- a/web/components/PeriodTabs.tsx
+++ b/web/components/PeriodTabs.tsx
@@ -23,6 +23,15 @@ export function periodSpec(id: Period): PeriodSpec {
   return PERIODS.find((p) => p.id === id) ?? PERIODS[2];
 }
 
+// ←/→ 키 네비게이션용 — 양끝 clamp (wrap-around 안 함, 사용자가 끝에 갇혔는지 인지 가능).
+export function periodNeighbor(id: Period, dir: -1 | 1): Period {
+  const idx = PERIODS.findIndex((p) => p.id === id);
+  if (idx < 0) return id;
+  const next = idx + dir;
+  if (next < 0 || next >= PERIODS.length) return id;
+  return PERIODS[next].id;
+}
+
 type Props = {
   value: Period;
   onChange: (id: Period, interval: ChartInterval, days: number) => void;
diff --git a/web/components/ShortcutsHelp.tsx b/web/components/ShortcutsHelp.tsx
index 7f19381..4cccfed 100644
--- a/web/components/ShortcutsHelp.tsx
+++ b/web/components/ShortcutsHelp.tsx
@@ -22,6 +22,8 @@ const SHORTCUTS: Shortcut[] = [
   { scope: "전역", keys: ["Esc"], label: "팝오버 / 오버레이 닫기" },
   { scope: "전역", keys: ["?"], label: "이 도움말 열기 / 닫기" },
   { scope: "종목 페이지", keys: ["F"], label: "차트 전체화면 토글" },
+  { scope: "종목 페이지", keys: ["←", "→"], label: "기간 탭 이전 / 다음" },
+  { scope: "종목 페이지", keys: ["S"], label: "관심종목 추가 / 제거" },
   { scope: "검색 팝오버", keys: ["↑", "↓"], label: "결과 이동" },
   { scope: "검색 팝오버", keys: ["Enter"], label: "선택한 종목으로 이동" },
 ];