The house always wins in the end. But every now and then they gotta let Aunt Bea hit the jackpot in the slots so she keeps coming back.
This is apparently the source: http://www.streetinsider.com/Corpor...g+Record+for+Second+Half+of+2010/6298884.html And here is the actual JPM document where they mention daily trading profits and the number of losing trading days by year (see page 7): http://files.shareholder.com/downlo...2901304c/2-15-11-Investor-Day-Invest-Bank.pdf