From 927a77d68b138778690d380fe7931cc37ce06c9e Mon Sep 17 00:00:00 2001
From: Tyler Hoang <tyler@tylerhoang.xyz>
Date: Tue, 19 May 2026 00:41:35 -0700
Subject: feat: fetch valuation on overview tab, add DCF block to
 ValuationOverviewCard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 frontend/app/page.tsx                              | 35 ++++++++++++++++-
 .../components/prism/ValuationOverviewCard.tsx     | 44 ++++++++++++++++++++--
 2 files changed, 74 insertions(+), 5 deletions(-)

diff --git a/frontend/app/page.tsx b/frontend/app/page.tsx
index 150aaff..07bdfa4 100644
--- a/frontend/app/page.tsx
+++ b/frontend/app/page.tsx
@@ -17,10 +17,11 @@ import { VolumeCard } from "@/components/prism/VolumeCard";
 import { ApiError, api } from "@/lib/api";
 import { deltaClass, fmtNumber, fmtPct } from "@/lib/format";
 import { buildKpis, limitIndices, marketClock, OVERVIEW_NAV_ITEMS, signalTone } from "@/lib/overview";
-import type { HistoryPoint, MarketIndex, SearchResult, TickerOverview, WatchlistResponse } from "@/types/api";
+import type { HistoryPoint, MarketIndex, SearchResult, TickerOverview, ValuationResponse, WatchlistResponse } from "@/types/api";
 
 type LoadState = "idle" | "loading" | "ready" | "invalid" | "error";
 type ChartState = "idle" | "loading" | "ready" | "error";
+type ValState = "idle" | "loading" | "ready" | "error";
 
 export default function OverviewPage() {
   return (
@@ -49,6 +50,8 @@ function OverviewClient() {
   const [overviewError, setOverviewError] = useState<string | null>(null);
   const [chartState, setChartState] = useState<ChartState>("idle");
   const [chartError, setChartError] = useState<string | null>(null);
+  const [valuation, setValuation] = useState<ValuationResponse | null>(null);
+  const [valState, setValState] = useState<ValState>("idle");
   const [watchlistError, setWatchlistError] = useState<string | null>(null);
   const [clockSnapshot, setClockSnapshot] = useState(() => marketClock());
 
@@ -229,6 +232,34 @@ function OverviewClient() {
     };
   }, [selectedTicker, period]);
 
+  useEffect(() => {
+    if (!selectedTicker) {
+      setValuation(null);
+      setValState("idle");
+      return;
+    }
+
+    let cancelled = false;
+    setValState("loading");
+    setValuation(null);
+
+    api
+      .valuation(selectedTicker)
+      .then((res) => {
+        if (!cancelled) {
+          setValuation(res);
+          setValState("ready");
+        }
+      })
+      .catch(() => {
+        if (!cancelled) setValState("error");
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [selectedTicker]);
+
   async function onSearchSubmit(event: FormEvent<HTMLFormElement>) {
     event.preventDefault();
     if (results[0]) {
@@ -318,7 +349,7 @@ function OverviewClient() {
               <div className="psm-column">
                 <ProfileCard overview={overview} />
                 <ShortInterestCard overview={overview} />
-                <ValuationOverviewCard overview={overview} />
+                <ValuationOverviewCard overview={overview} valuation={valuation} valState={valState} />
                 <QualityCard overview={overview} />
               </div>
             </div>
diff --git a/frontend/components/prism/ValuationOverviewCard.tsx b/frontend/components/prism/ValuationOverviewCard.tsx
index f85e443..9e59787 100644
--- a/frontend/components/prism/ValuationOverviewCard.tsx
+++ b/frontend/components/prism/ValuationOverviewCard.tsx
@@ -1,11 +1,15 @@
-import type { TickerOverview } from "@/types/api";
-import { fmtCurrency, fmtLarge, fmtNumber } from "@/lib/format";
+import type { TickerOverview, ValuationResponse } from "@/types/api";
+import { fmtCurrency, fmtLarge, fmtNumber, fmtPct } from "@/lib/format";
+
+type ValState = "idle" | "loading" | "ready" | "error";
 
 type Props = {
   overview: TickerOverview;
+  valuation: ValuationResponse | null;
+  valState: ValState;
 };
 
-export function ValuationOverviewCard({ overview }: Props) {
+export function ValuationOverviewCard({ overview, valuation, valState }: Props) {
   const rows = [
     { label: "Market Cap", value: fmtLarge(overview.stats.market_cap), missing: overview.stats.market_cap == null },
     { label: "P/E TTM", value: overview.stats.trailing_pe == null ? "-" : `${fmtNumber(overview.stats.trailing_pe)}x`, missing: overview.stats.trailing_pe == null },
@@ -17,6 +21,8 @@ export function ValuationOverviewCard({ overview }: Props) {
   ];
 
   const visible = rows.filter((r) => !r.missing);
+  const dcf = valuation?.dcf;
+  const showDcf = dcf?.available && dcf.intrinsic_value_per_share != null;
 
   return (
     <section className="psm-card">
@@ -36,6 +42,38 @@ export function ValuationOverviewCard({ overview }: Props) {
           ))}
         </div>
       )}
+      {valState === "loading" && (
+        <>
+          <hr className="psm-divider" />
+          <div className="psm-stat-list">
+            <div className="psm-stat-row">
+              <span className="psm-stat-label psm-skeleton" style={{ width: "120px", height: "14px", display: "inline-block" }} />
+              <span className="psm-stat-value psm-skeleton" style={{ width: "60px", height: "14px", display: "inline-block" }} />
+            </div>
+            <div className="psm-stat-row">
+              <span className="psm-stat-label psm-skeleton" style={{ width: "100px", height: "14px", display: "inline-block" }} />
+              <span className="psm-stat-value psm-skeleton" style={{ width: "48px", height: "14px", display: "inline-block" }} />
+            </div>
+          </div>
+        </>
+      )}
+      {valState === "ready" && showDcf && dcf && (
+        <>
+          <hr className="psm-divider" />
+          <div className="psm-stat-list">
+            <div className="psm-stat-row">
+              <span className="psm-stat-label">DCF Intrinsic Value</span>
+              <span className="psm-stat-value">{fmtCurrency(dcf.intrinsic_value_per_share)}</span>
+            </div>
+            {dcf.growth_rate_used != null && (
+              <div className="psm-stat-row">
+                <span className="psm-stat-label">FCF Growth Used</span>
+                <span className="psm-stat-value">{fmtPct(dcf.growth_rate_used)}</span>
+              </div>
+            )}
+          </div>
+        </>
+      )}
     </section>
   );
 }
-- 
cgit v1.3-2-g0d8e