JPMorgan CEO Jamie Dimon Says The Bank Is Currently Overearning; Says This Year Expenses Could Be Higher; Says There Could Be Opportunities For M&A, Adds "We Are On The Lookout"; Investment Banking In Q2 Could Be Up 10% Or More; Says Equity Capital Markets Will Be Huge This Year; Trading Could Be Up By 11% In Q2 Or Could Be A Bit Better; Says Expenses For FY Could Be $106B Vs Earlier Forecast Of About $105B; Says Higher Expenses Likely To Be Higher Driven By Better Performance