So let me speak very generally about some of the issues that Daal raised... Especially, since I am being accused of being non-constructive. My goal here was to avoid getting into a discussion that would be more about our biases than about the substance of the issues.
So there are a few points and I'll try to be as specific as I can. I am happy to expand on any of the particular statements made.
1) The main and the biggest issue with the idea that risk concentration (and, more broadly, Ackman's risk management strategy) is fine is very simple. Specifically, it ignores the simple fact that any hedge fund is a highly leveraged institution. In fact, the conclusions in the article about the stock portfolio diversification in the presence of leverage are very telling.
2) In a setting where leverage is present and, especially where a "value" strategy is used, it's contradictory and nonsensical to use Optimal F or Kelly (full or half or whatever) as one's benchmarks. There is ample literature on this. This is also the reason why direct comparisons with Buffett are inappropriate.
3) This is a very useful guide to the particular issues that apply to hedge funds (straight from the horse's mouth, so to speak):
http://www.hkimr.org/uploads/seminars/133/sem_paper_0_343_capula_risk_framework_v11.pdf
The chart on page 26 in that document is instructive.
4) The argument that PS is somehow special and typical hedge fund constraints and leverage logic don't apply to Bill Ackman is not credible. I see no evidence whatsoever that Ackman's arrangements with his investors, prime brokers and administrators/custodians are magically less onerous than for other funds. Furthermore, it's silly to argue that it's not the manager's fault that their investors are more risk-averse than expected. Managing and satisfying investors is part of the job description for any hedge fund manager.
5) Finally, one needs to also be realistic about the negative externalities associated with getting a highly concentrated bet wrong. For instance, Bill Ackman has had to join VRX board. This means that his VRX investment is completely illiquid for an indeterminate amount of time going forward (especially, in light of the Quebec MCTO). There are several other concerns along similar, but unrelated lines.
6) IMHO, given the compensation that hedge fund managers receive, they do not deserve the right to make mistakes. As far as I am concerned, Ackman's conduct demonstrates multiple errors of judgement and he has already struck out once before. I am not referring here so much to the initial size of the VRX bet, but rather everything that followed (especially, the options trade).
So there are a few points and I'll try to be as specific as I can. I am happy to expand on any of the particular statements made.
1) The main and the biggest issue with the idea that risk concentration (and, more broadly, Ackman's risk management strategy) is fine is very simple. Specifically, it ignores the simple fact that any hedge fund is a highly leveraged institution. In fact, the conclusions in the article about the stock portfolio diversification in the presence of leverage are very telling.
2) In a setting where leverage is present and, especially where a "value" strategy is used, it's contradictory and nonsensical to use Optimal F or Kelly (full or half or whatever) as one's benchmarks. There is ample literature on this. This is also the reason why direct comparisons with Buffett are inappropriate.
3) This is a very useful guide to the particular issues that apply to hedge funds (straight from the horse's mouth, so to speak):
http://www.hkimr.org/uploads/seminars/133/sem_paper_0_343_capula_risk_framework_v11.pdf
The chart on page 26 in that document is instructive.
4) The argument that PS is somehow special and typical hedge fund constraints and leverage logic don't apply to Bill Ackman is not credible. I see no evidence whatsoever that Ackman's arrangements with his investors, prime brokers and administrators/custodians are magically less onerous than for other funds. Furthermore, it's silly to argue that it's not the manager's fault that their investors are more risk-averse than expected. Managing and satisfying investors is part of the job description for any hedge fund manager.
5) Finally, one needs to also be realistic about the negative externalities associated with getting a highly concentrated bet wrong. For instance, Bill Ackman has had to join VRX board. This means that his VRX investment is completely illiquid for an indeterminate amount of time going forward (especially, in light of the Quebec MCTO). There are several other concerns along similar, but unrelated lines.
6) IMHO, given the compensation that hedge fund managers receive, they do not deserve the right to make mistakes. As far as I am concerned, Ackman's conduct demonstrates multiple errors of judgement and he has already struck out once before. I am not referring here so much to the initial size of the VRX bet, but rather everything that followed (especially, the options trade).
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