On CNBC's "Fast Money Halftime Report," Pete Najarian spoke about unusually high options activity in Mosaic Co (NYSE:MOS). Traders bought around 4,000 contracts of the November $21 calls for 95 cents in the first half of the trading session. Najarian bought the stock and he is going to sell calls against his long position.
He also noticed big options volume in Marvell Technology Group Ltd. (NASDAQ:MRVL). Traders were buying the October $43.50 calls for 60 cents in the name. Najarian owns these calls and they expire on Friday.