Take While the S&P 500 has defied virtually every warning in the past six months, clocking one of the best stretches since the 1950s, this October gap indicates some investors are covering their shorts ahead of the "It's not easy to short this market because it feels like this rally is never going to end," said Thomas Thornton, founder of Hedge Fund Telemetry, who has a small net short position in the S&P 500 and the Nasdaq 100 Index. "It's painful and discouraging to get your face ripped off everyday."B ...