fix(ticker): carry a rounded thousand to the next unit in compact()

src/advisor.mjs

@@ -279,8 +279,18 @@ function compact(v) {
   const n = Number(v);
   if (!Number.isFinite(n)) return null;
   const units = [[1e12, "T"], [1e9, "B"], [1e6, "M"], [1e3, "K"]];
-  for (const [size, suffix] of units) {
-    if (Math.abs(n) >= size) return `${(n / size).toFixed(2).replace(/\.?0+$/, "")}${suffix}`;
+  for (let i = 0; i < units.length; i++) {
+    const [size, suffix] = units[i];
+    if (Math.abs(n) < size) continue;
+    // Rounding to 2 decimals can push a value just under the next boundary up to
+    // a full thousand of this unit (999,999,999 → "1000M"); carry it to the next
+    // unit up (→ "1B") so the number never reads as an un-carried thousand.
+    const scaled = (n / size).toFixed(2);
+    if (Math.abs(Number(scaled)) >= 1000 && i > 0) {
+      const [upSize, upSuffix] = units[i - 1];
+      return `${(n / upSize).toFixed(2).replace(/\.?0+$/, "")}${upSuffix}`;
+    }
+    return `${scaled.replace(/\.?0+$/, "")}${suffix}`;
   }
   return String(n);
 }

test/advisor.test.mjs

@@ -185,6 +185,19 @@ test("a report missing its optional sections still renders", () => {
   assert.match(renderAdvisor("report", bare, { columns: 88 }), /AAA/);
 });
 
+test("fundamentals just under a magnitude boundary carry to the next unit", () => {
+  // 999,999,999 rounds to 1000.00 of a million; it must read "1B", not "1000M".
+  const near = {
+    ticker: "AAA", lastPrice: null, disclaimer: "d",
+    facts: { source: "sec", marketCap: 999999999, revenue: 999999, freeCashFlow: 999999999999 },
+  };
+  const out = renderAdvisor("report", near, { columns: 88 });
+  assert.match(out, /cap 1B\b/);
+  assert.match(out, /rev 1M\b/);
+  assert.match(out, /fcf 1T\b/);
+  assert.doesNotMatch(out, /1000M|1000K|1000B/);
+});
+
 test("empty result sets say so instead of rendering an empty table", () => {
   assert.match(renderAdvisor("signals", { ticker: "AAA", signals: [] }), /no signals indexed/);
   assert.match(renderAdvisor("search", { query: "zzz", results: [] }), /nothing indexed matches/);