Now that oil prices have fallen below $46, any euphoria over cheaper energy will be tempered by losses that are starting to show up in investment funds, retirement accounts and bank balance sheets. The bear market has wiped out a total of $393 billion since June -- $353 billion from the shares of 76 companies in the Bloomberg Intelligence North America Exploration & Production index, and almost $40 billion from high-yield energy bonds, issued by many shale drillers, according to a Bloomberg index.