diff --git a/server/src/db/repositories/RiskRepository.ts b/server/src/db/repositories/RiskRepository.ts
index b682adc5cef..7c0d768f0b4 100644
--- a/server/src/db/repositories/RiskRepository.ts
+++ b/server/src/db/repositories/RiskRepository.ts
@@ -31,13 +31,15 @@ export class RiskRepository {
       );
 
       const savedScore = scoreRows[0];
-      const savedSignals: RiskSignal[] = [];
 
       // 2. Insert Risk Signals
       // BOLT OPTIMIZATION: Use batched inserts with chunking to reduce database round-trips.
       // This reduces latency from O(N) to O(N/chunkSize), typically O(1) for normal signal counts.
       if (input.signals && input.signals.length > 0) {
         const chunkSize = 100;
+        // BOLT OPTIMIZATION: Hoist default timestamp creation to avoid redundant object allocations.
+        const defaultDetectedAt = new Date();
+
         for (let i = 0; i < input.signals.length; i += chunkSize) {
           const chunk = input.signals.slice(i, i + chunkSize);
           const values: any[] = [];
@@ -53,7 +55,7 @@ export class RiskRepository {
               sig.weight,
               sig.contributionScore,
               sig.description || null,
-              sig.detectedAt || new Date(),
+              sig.detectedAt || defaultDetectedAt,
             );
             placeholders.push(
               `($${paramIndex}, $${paramIndex + 1}, $${paramIndex + 2}, $${paramIndex + 3}, $${paramIndex + 4}, $${paramIndex + 5}, $${paramIndex + 6}, $${paramIndex + 7})`,
@@ -64,13 +66,10 @@ export class RiskRepository {
           const sql = `
             INSERT INTO risk_signals (
               risk_score_id, type, source, value, weight, contribution_score, description, detected_at
-            ) VALUES ${placeholders.join(', ')}
-            RETURNING *`;
+            ) VALUES ${placeholders.join(', ')}`;
 
-          const sigRows = await tx.query(sql, values);
-          for (const row of sigRows) {
-            savedSignals.push(this.mapSignal(row));
-          }
+          // BOLT OPTIMIZATION: Removed RETURNING * and mapping loop as signals are not part of RiskScore return value.
+          await tx.query(sql, values);
         }
       }