CBS reported a strong first quarter this week, and traders apparently think that the good news will keep on coming.
OptionMonster's tracking programs detected buying in the September 50 calls for $2.15 and the September 55 calls for $0.85. Calls outnumbered puts by more than 13,000 to 3,000, a reflection of the bullish sentiment.
These calls lock in the price where the stock can be purchased, so they can generate some nice leverage in a rally. Traders use these options because they also limit the amount of money that can be lost if the shares drop.