diff --git a/src/main/java/Model/Exchange.java b/src/main/java/Model/Exchange.java
index 320fae8..65fa6aa 100644
--- a/src/main/java/Model/Exchange.java
+++ b/src/main/java/Model/Exchange.java
@@ -66,8 +66,8 @@ public Transaction buy(String symbol, BigDecimal quantity, Player player) {
         // lager en ny "andel" basert på nåværende salgspris
         Share shareToBuy = new Share(stock, quantity, stock.getSalesPrice());
         
-        // oppretter kjøpstransaksjonen for den uka
-        Purchase purchase = new Purchase(shareToBuy, this.week);
+        // oppretter kjøpstransaksjonen for den uka via fabrikken
+        Transaction purchase = TransactionFactory.createPurchase(shareToBuy, this.week);
         
         // committer til player
         purchase.commit(player);
@@ -81,8 +81,8 @@ public Transaction sell(Share share, Player player) {
             return null;
         }
 
-        // oppretter salgstransaksjonen for den uka
-        Sale sale = new Sale(share, this.week);
+        // oppretter salgstransaksjonen for den uka via fabrikken
+        Transaction sale = TransactionFactory.createSale(share, this.week);
         
         // commiter til player
         sale.commit(player);