The credit market collects credits for you over time. It currently has 10 levels. The Credit Market will automatically generate credits for the player while it is operational. No credits will be generated while the building is damaged. The Credit Market can only hold so many credits at once. If the market becomes full, no credits will be generated until you collect them all. Keep in mind that you cannot collect credits if your Credit Vault is full. The Credit Market is a 3x3 building.