On CNBC's "Fast Money Halftime Report," Jon Najarian spoke about unusually high options activity in Cheesecake Factory Inc (NASDAQ:CAKE). He noticed a large order for the October $55 calls and he decided to follow the trade.

Call options in Marathon Oil Corporation (NYSE:MRO) were also active on Friday. Traders were buying the November $15 calls. Najarian has already had a long position in the name and he decided to buy more calls on Friday.