Options activity was huge in MGM Resorts yesterday, and fast money was the name of the game.

The Weekly 11 calls expiring today really stood out on OptionMonster's tracking systems, with buyers snapping up contracts early for $0.05. The stock eased off the highs of the month, and we shot out an alert with the calls going for $0.04. But then buyers returned and inflated the premiums into the close, more than doubling them to $0.12.