feat: add PriceVsValueCard to overview left column (DCF compass)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/frontend/components/prism/PriceVsValueCard.tsx b/frontend/components/prism/PriceVsValueCard.tsx
new file mode 100644
index 0000000..95124ce
--- /dev/null
+++ b/frontend/components/prism/PriceVsValueCard.tsx
@@ -0,0 +1,90 @@
+import type { TickerOverview, ValuationResponse } from "@/types/api";
+import { fmtCurrency, fmtPct } from "@/lib/format";
+
+type ValState = "idle" | "loading" | "ready" | "error";
+
+type Props = {
+  overview: TickerOverview;
+  valuation: ValuationResponse | null;
+  valState: ValState;
+};
+
+function barPositions(price: number, iv: number): {
+  leftPct: number;
+  widthPct: number;
+  pricePct: number;
+  ivPct: number;
+  isPremium: boolean;
+} {
+  const padding = 0.1;
+  const min = Math.min(price, iv) * (1 - padding);
+  const max = Math.max(price, iv) * (1 + padding);
+  const range = max - min;
+  if (range === 0) return { leftPct: 50, widthPct: 0, pricePct: 50, ivPct: 50, isPremium: false };
+
+  const pricePct = ((price - min) / range) * 100;
+  const ivPct = ((iv - min) / range) * 100;
+  const leftPct = Math.min(pricePct, ivPct);
+  const widthPct = Math.abs(pricePct - ivPct);
+
+  return { leftPct, widthPct, pricePct, ivPct, isPremium: price > iv };
+}
+
+export function PriceVsValueCard({ overview, valuation, valState }: Props) {
+  if (valState === "idle" || valState === "loading" || valState === "error") return null;
+
+  const dcf = valuation?.dcf;
+  if (!dcf?.available || dcf.intrinsic_value_per_share == null) return null;
+
+  const price = overview.quote.price ?? overview.range_52w.price;
+  if (price == null) return null;
+
+  const iv = dcf.intrinsic_value_per_share;
+  const { leftPct, widthPct, pricePct, ivPct, isPremium } = barPositions(price, iv);
+  const pct = ((price - iv) / iv) * 100;
+  const pctLabel = isPremium
+    ? `Trading at ${pct.toFixed(1)}% premium to DCF`
+    : `Trading at ${Math.abs(pct).toFixed(1)}% discount to DCF`;
+
+  const [leftLabel, rightLabel] = isPremium
+    ? [`IV ${fmtCurrency(iv)}`, `Price ${fmtCurrency(price)}`]
+    : [`Price ${fmtCurrency(price)}`, `IV ${fmtCurrency(iv)}`];
+
+  return (
+    <section className="psm-card">
+      <div className="psm-card-head">
+        <div>
+          <div className="psm-eyebrow">Price vs Value</div>
+          <h2 className="psm-card-title">Intrinsic Value</h2>
+        </div>
+      </div>
+      <div className="psm-pvv-figures">
+        <span className="psm-pvv-current">{fmtCurrency(price)}</span>
+        <span className={`psm-pvv-iv ${isPremium ? "negative" : "positive"}`}>
+          {isPremium ? "↑" : "↓"} IV {fmtCurrency(iv)}
+        </span>
+      </div>
+      <div className="psm-pvv-rail">
+        <div
+          className="psm-pvv-fill"
+          style={{
+            left: `${leftPct}%`,
+            width: `${widthPct}%`,
+            background: isPremium ? "var(--negative)" : "var(--positive)",
+            opacity: 0.5,
+          }}
+        />
+        <div className="psm-pvv-tick price" style={{ left: `${pricePct}%` }} />
+        <div className="psm-pvv-tick iv" style={{ left: `${ivPct}%` }} />
+      </div>
+      <div className="psm-pvv-rail-labels">
+        <span>{leftLabel}</span>
+        <span>{rightLabel}</span>
+      </div>
+      <p className="psm-pvv-meta">
+        {pctLabel} · WACC {fmtPct(dcf.wacc)} · {dcf.projection_years}yr
+        {dcf.growth_rate_used != null ? ` · growth ${fmtPct(dcf.growth_rate_used)}` : ""}
+      </p>
+    </section>
+  );
+}