My PSH (Ackman's fund) investment is not doing so great but frankly, I'm not concerned. I shorted some amount of VRX to get the total exposure down to 5-7% (from 15%+) exactly so I could whether any storm that could arise from the volatility. This is like an early stage berkshire, people can scream and panic all day in the media about how this is the end of ackman but buffett has had 3 50% drawdowns in his career, and a number of 30% ones. And he had a lot more diversification than Ackman. The public hedge fund is not subject to redemptions so I don't see much of a reason to panic. Even if he is wrong on VRX, the value in the other stocks compansate to the shareholder, specially if the exposure is brought down to 5% by shorting VRX common