Yankee Swap (also known as the Prize Swapping Competition) is a recurring Power of Veto and Head of Household competition. It is unique among competitions in that the winner of the competition does not automatically win the Veto/HoH.
The players will compete in a series of rounds where they must try to score the highest number. The player with the lowest score each round will be eliminated from the game. Once they are eliminated, they must claim a prize which may contain money, vacations, advantages in the game, punishments, the power of veto, or the HOH key. The players that are eliminated in later rounds will have the option of keeping the prize that they have received or trading it for other prizes that have already been revealed. The player with the power of veto (or HOH key) in their possession at the end of the final round will win POV or HOH.
Big Brother 11 is the only season where this competition was played as a Head of Household competition. This competition was originally going to be a Veto competition, however, because of Chima Simone's expulsion, it was later played as an HOH competition instead.
Big Brother 8 is the only season where none of the prizes and punishments were traded.
Big Brother 8 is the only season where the Power of Veto was awarded last. In all of the subsequent seasons that featured this competition the veto was awarded first.