diff --git a/src/lib/analytics/__tests__/mood-series.test.ts b/src/lib/analytics/__tests__/mood-series.test.ts
index 07ec24220..e29667876 100644
--- a/src/lib/analytics/__tests__/mood-series.test.ts
+++ b/src/lib/analytics/__tests__/mood-series.test.ts
@@ -83,6 +83,19 @@ describe("buildMoodDailySeries", () => {
     expect(series.summary.count).toBe(2);
   });
 
+  it("bounds the live walk to the window the rollup read covers", async () => {
+    await buildMoodDailySeries("user-1");
+    const [rollupUser, since] = vi.mocked(readMoodDayRollups).mock.calls[0] as [
+      string,
+      Date,
+    ];
+    expect(rollupUser).toBe("user-1");
+    const args = vi.mocked(prisma.moodEntry.findMany).mock.calls[0]?.[0] as {
+      where: { moodLoggedAt?: { gte: Date } };
+    };
+    expect(args.where.moodLoggedAt?.gte).toEqual(since);
+  });
+
   it("returns an empty series for a user with no rollups and no raw entries", async () => {
     const series = await buildMoodDailySeries("user-1");
     expect(series.entries).toEqual([]);
diff --git a/src/lib/analytics/mood-series.ts b/src/lib/analytics/mood-series.ts
index 676eb62e4..8e57d64e3 100644
--- a/src/lib/analytics/mood-series.ts
+++ b/src/lib/analytics/mood-series.ts
@@ -116,11 +116,12 @@ export async function buildMoodDailySeries(
     return { entries, summary, entryCount, source: "rollup" };
   }
 
-  // Coverage fallback — no rollup rows yet. Run the legacy live walk ONCE;
-  // the warm-up above mints the rollups for the next request.
+  // Coverage fallback — no rollup rows yet. Run the live walk ONCE over the
+  // same window the rollup read covers; the warm-up above mints the rollups
+  // for the next request.
   const moodEntries = await client.moodEntry.findMany({
     // v1.7.0 sync — exclude tombstoned rows from the fallback.
-    where: { userId, deletedAt: null },
+    where: { userId, deletedAt: null, moodLoggedAt: { gte: since } },
     orderBy: { moodLoggedAt: "asc" },
     select: { date: true, score: true },
   });