Bill Ackman Blames Abysmal Performance On Hedge Fund Groupthink
There were many excuses in Bill Ackman's annual letter to shareholders, in fact some 13 pages worth, which sought to explain how "Pershing Square funds suffered their greatest peak-to-trough decline and worst annual performance ever."
To be sure, Ackman is quick to point out that the 21% plunge in P&L in 2015 was not just due to his infamous tryst with Valeant, although that's where it started: