2. Apple always bounces back.
If you can keep a good stock down, then you are able to load up for the ride back up. It's like a slingshot -- the harder you pull, the more propulsion you generate.
Over the long run, Apple fundamentals will certainly take the stock higher, but hedge funds want to maximize the ride. Keeping a great stock down allows them to profit from quick predetermined trades rather than being fully invested all the time.
If they can control the price action on the downside, they can take even bigger risks during the inevitable periods of upside momentum. After riding the Apple slingshot, the hedge funds go back and do it again and again.