The six biggest U.S. banks, led by JPMorgan Chase & Co. and Bank of America Corp., have piled up $103 billion in legal costs since the financial crisis, more than all dividends paid to shareholders in the past five years, Bloomberg News reported today. That’s the amount allotted to lawyers and litigation, as well as for settling claims about shoddy mortgages and foreclosures, according to data compiled by Bloomberg. About 40 percent of the legal and litigation outlays arose since January 2012, and banks are warning the tally may surge as regulators, prosecutors and investors press new claims. JPMorgan and Bank of America bore about 75 percent of the total costs, according to the figures compiled from company reports. JPMorgan devoted $21.3 billion to legal fees and litigation since the start of 2008, more than any other lender, and added $8.1 billion to reserves for mortgage buybacks, filings show.