"...Around Labor Day, Mr. Birnbaum was asked to ratchet back one of his short positions by $250 million, according to Hayman Capital managing partner Kyle Bass, a client who had similar positions at the time. Mr. Bass says he made $100 million by relieving Goldman of that particular short bet. "It appeared to me that [the traders] constantly fought a VaR battle with the firm once the market started to break," says Mr. Bass...."