Rupert Murdoch, who may have spent the equivalent of the projected earnings of News Corp.'s hit movie to settle lawsuits against his supermarket-coupon unit, risks losing millions more at a trial over alleged anticompetitive behavior by the same business. News Corp. agreed last month to pay $US500 million to Valassis Communications Inc. to settle claims that its tactics caused $US1.5 billion in damages. The settlement kept the spotlight of a trial off allegations that News Corp. employees threatened smaller rivals, destroyed signs in supermarkets and broke into computers to steal trade secrets.