He probably won't win a lot of sympathy for this, but it looks like JPMorgan's Jamie Dimon is going to lose bragging rights of being the nation's highest-paid banking exec. The board is expected to dock Dimon's 2012 bonus because of the disastrous "London whale" trading mess that cost the bank more than $6 billion, reports the Wall Street Journal. Last year, Dimon got a $4.5 million cash bonus, along with stock and option awards that brought his total compensation to $23.1 million. A sizable bonus hit would make Wells Fargo's John Stumpf ($19.8 million) the new compensation king. The bank releases earnings and an internal report on the Whale next week.