Some hedge funds are good at it, and some are bad it. The existence of a winnable game doesn't mean that everyone who attempts it will succeed. Especially since

Some hedge funds are good at it, and some are bad it. The existence of a winnable game doesn't mean that everyone who attempts it will succeed. Especially since the game is competitive, so if I have better insider information than you, I can take from you you all the money you take from the non-insider traders.