'Anything can make or break a market,' Tighe explained in his delicate brogue, 'from the failure of a bank to the rumor that your second cousin's grandmother has a cold. It's a most unusual world, Cowperwood. No man can explain it. I've seen breaks in stocks that you could never explain at all--no one could... My God, the rumors of the stock exchange! They beat the devil.' -- from The Financier, by Theodore Dreiser.