The bulls targeted Vodafone for the second session in a row yesterday.
OptionMonster's tracking programs detected unusual activity in the July 28 calls. More than 12,000 contracts traded against previous open interest of 1,746, indication new positioning, with most of the volume pricing for $0.50.
These calls lock in the price where the shares can be bought. They can generate some nice leverage from a modest gain in the stock, but also can expire worthless if it doesn't move.