diff --git a/src/data/mockData.ts b/src/data/mockData.ts
index fa019a9..bfb92f9 100644
--- a/src/data/mockData.ts
+++ b/src/data/mockData.ts
@@ -85,11 +85,15 @@ function generateTransactions(count: number, maxAgeMs: number): Transaction[] {
   return transactions.sort((a, b) => b.timestamp - a.timestamp);
 }
 
+const POOL_GENERATED_AT = Date.now();
 const TRANSACTION_POOL = generateTransactions(2400, 30 * 24 * 60 * 60 * 1000);
 
 export function getTransactionsForPeriod(periodDays: number): Transaction[] {
+  const drift = Date.now() - POOL_GENERATED_AT;
   const cutoff = Date.now() - periodDays * 24 * 60 * 60 * 1000;
-  return TRANSACTION_POOL.filter((tx) => tx.timestamp >= cutoff);
+  return TRANSACTION_POOL
+    .map((tx) => ({ ...tx, timestamp: tx.timestamp + drift }))
+    .filter((tx) => tx.timestamp >= cutoff);
 }
 
 export function computeStats(transactions: Transaction[]) {