Major funds Fidelity, Janus Henderson, JPMorgan, Tiger Global Management and Coatue, placed bets on Apple before October's 15% decline. Burned by "Red October" market bloodbath, hedge funds have had their worst month since May 2010. Tech specifically saw a massive sell off in October. A survey found funds are least bullish on tech stocks since the financial crisis. Hedge fund Goliaths made some major wrong-way bullish bets on Apple, just before the stock crashed. The so called "Red October" markets bloodbath made it an already brutal month for investors of all stripes.