I'm not sure how many people trade in here, but those who do will sure know how hard is not to have a losing day every now and then. Well, that's no problem for Goldman, who in the first trimester of this year didn't have a single losing day in their intraday.
This would be statistically impossible in an efficient market, but I guess when you are the market and set the rules it's fairly easy. So much for investment banking, underwriting or advisory. 76% of Goldman's $9.7 billion revenue in Q1 came from trading.