Moody’s warns of heavy insurance losses By: MarketWatch March 14, 2011 at 14:33 PM EDT Japan earthquake may cause over $100 billion of economic losses and $15 billion to $35 billion of insured losses, according to catastrophe modeling firms. Read More >> Related Stocks: American International Group Aspen Insurance Holdings Berkshire Hathaway Berkshire Hathaway Chubb Limited Everest Re Group