Pete Najarian Sees Unusual Options Activity In Calpine

On CNBC's "Fast Money Halftime Report", Pete Najarian said that he noticed unusually high options activity in Calpine Corporation CPN at the end of the trading session on Monday.

He said that somebody bought 10,000 contracts of the September 15 calls, which increased the open interest for the strike to 15,000 contracts. Najarian decided to follow the trade and he is planning to hold the position until September.