Thanks, Fed! The Federal Reserve's low interest rate policies have cheated savers out of $758 billion since the Great Recession ended, according to a new study Tuesday. Low returns and inflation meant to stimulate the economy have cost bank customers around $100 billion in purchasing power each year since 2008. The policies helped mortgage rates fall and injected liquidity into the flailing economy. New Fed chief Janet Yellen said low rates will continue for the foreseeable future.