Jewelry Giant Sells $250 Million in Debt; Is It a Good Strategy? Warren Buffett must be in a romantic mood ahead of Valentine's Day. Mr. Buffett's Berkshire Hathaway bought $250 million of debt from jewelry giant buy tiffany . The debt sports a yield of 10%, according to Tiffany's Securities and Exchange Commission filing. New York-based Tiffany said it will use the proceeds to refinance existing debt and for general corporate purposes. The investment is the latest in a