March 12 (Bloomberg) -- Billionaire Warren Buffett said Berkshire Hathaway Inc. plans to sell more derivative contracts, a tactic some investors have said may cause the insurer to suffer billions of dollars in losses. âOh, weâll continue,â he said in a Bloomberg Television interview, portions of which will be broadcast today and tomorrow. âWe do anything that I think I understand and where I think that the odds strongly favor making money, which doesnât mean you make money every time.â Berkshireâs stock has plummeted this year on concern that Buffettâs bets on derivatives -- which he has called âfinancial weapons of mass destructionâ -- will crush profit at the Omaha, Nebraska-based insurer. Berkshire is backing derivatives tied to corporate junk bonds, municipal debt and the performance of stock indexes on three continents, with liability of more than $14 billion as of Dec. 31. The companyâs liability could grow, or shrink to zero, by the time the contracts come due at set dates as many as 19 years away. The increase in liabilities on 251 derivatives, coupled with a drop in equity holdings, last year contributed to the steepest decline in the book value per share in Buffettâs 44-year tenure. Book value, a measure of assets minus liabilities, still outperformed the return of the benchmark Standard & Poorâs 500 Index in 2008. Buffett gives both figures on the first page of Berkshireâs annual report each year. http://www.bloomberg.com/apps/news?pid=20601087&sid=a2CDceCzr3Jk&refer=home Warren B. is my hero ! Ha, ha, ha!