The legal scrutiny of how banks and brokerages treat their customers during high interest rates intensifies as the phase is drawing to a close. Many large U.S. banks are accused of deceiving clients to make profits of billions of dollars.JPMorgan & Chase (JPM) , Raymond James (RJF) , Morgan Stanley (MS) , Wells Fargo (WFC) and a few other banks and brokerage firms were sued for transferring clients' idle funds into sweep accounts with near-zero interest rates.Cash sweep accounts are intended to convert idle ...