Oklahoma?s Hamm plunges on Forbes billionaires list in oil rout
Oklahoma?s Hamm plunges on Forbes billionaires list in oil rout
March 1 (Reuters) - In the 16 months since Oklahoma oilman Harold Hamm dismissed OPEC as a "toothless tiger" because of growing U.S. energy independence, shares in his Oklahoma City-based Continental Resources Inc, a major shale oil driller, have fallen about 60 percent.