A large profit on the sale of your home could be responsible for showing a large negative Housing amount. The calculation for this column can be seen in detail on the Housing screen. If you sell your home (downsize or upsize) you will see an amount appear in the Net Purchase column in the year this transaction takes place. If your sale created a profit for you (for example, you downsized and there were positive proceeds from the sale), you will see a negative number in the Net Purchase column. In other words, a negative purchase is a gain to you. If the sale costs you because you are purchasing a more expensive home, then you will see a positive number indicating the amount extra needed to make that transaction.