I was reviewing today’s trading in search for the answer to the question of the day: why the heck did the market rally 2%? Someone with a much bigger account than Joe Schmo placed a trade in the middle of last night that rivaled periods of today’s intra-day volume. This trade sent S&P futures up over 1% in a matter of seconds. There was no news at the time that warranted such a move. Did a big player need to break even on a sizable overnight trading error? Probably not, but that’s as good a guess as any for today’s move….