diff --git a/backend/src/graphql/model/Transaction.ts b/backend/src/graphql/model/Transaction.ts
index dc20a5c83..50ca7d098 100644
--- a/backend/src/graphql/model/Transaction.ts
+++ b/backend/src/graphql/model/Transaction.ts
@@ -52,7 +52,7 @@ export class Transaction {
     this.linkId = transaction.contribution
       ? transaction.contribution.contributionLinkId
       : transaction.transactionLinkId || null
-    this.previousBalance = previuosBalance
+    this.previousBalance = previuosBalance.toDecimalPlaces(2, Decimal.ROUND_DOWN)
   }
 
   @Field(() => Int)
diff --git a/backend/src/graphql/resolver/TransactionResolver.ts b/backend/src/graphql/resolver/TransactionResolver.ts
index 8c51c6681..72e919dad 100644
--- a/backend/src/graphql/resolver/TransactionResolver.ts
+++ b/backend/src/graphql/resolver/TransactionResolver.ts
@@ -288,7 +288,8 @@ export class TransactionResolver {
         userTransaction.typeId === TransactionTypeId.CREATION
           ? communityUser
           : involvedUsers.find((u) => u.id === userTransaction.linkedUserId)
-      const previousBalance = idx ? userTransactions[idx - 1].balance : new Decimal(0)
+      const previousBalance =
+        idx < userTransactions.length - 1 ? userTransactions[idx + 1].balance : new Decimal(0)
       transactions.push(new Transaction(userTransaction, self, linkedUser, previousBalance))
     })
     logger.debug(`TransactionTypeId.CREATION: transactions=${transactions}`)