Harmony Gold Mining Co. has been bouncing, and the bulls are looking for the miner to keep climbing.
OptionMonster's scanners detected the purchase of more than 4,000 May 10 calls for $0.40 yesterday. Volume was more than 17 times previous open interest at the strike, so new money was definitely being put to work.
These calls lock in the price where investors can buy shares in the South African company. The options can generate significant leverage in the event of a rally because of their cheapness relative to the stock, but they will expire worthless if the shares don't move.