often the correct explanation is somebody had a bug That's true in general. But there are literally billions of dollars in play every day on Wall Street. One q

often the correct explanation is somebody had a bug That's true in general. But there are literally billions of dollars in play every day on Wall Street. One quip I've heard is IIRC "there are no coincidences on Wall Street". Never assume bad intentions when assuming stupidity is enough Wall Street does not, in general, employ stupid people. Stoned, perhaps (c.f. Jimmy Cayne), but not stupid.