Quote from chvid:
TraderZones - what is your point?
What are you trying to bring to this thread other than stating that you have worked for two investment banks?
Given the arbitrary and secretive nature of this I don't think any single individual have a full picture of what is going on strategy-wise at hedge funds.
I found that some litterature gives hints to what strategies are used: I.e. Richard Bookstaber's A demon of our own design mentions reversal to mean pair trading.
Andrew Lo's paper on why did quants blow up last august uses a reversal to mean model as well.
Also I imagine portfolio diversification techniques are commonly used.
As for phds - option pricing requires a fair bit of math so a sciences background is certainly relevant.
And it is probably a good selling point for a hedge fund being able to say that your staff consists of super smart chess playing russian phds.
Remember a hedge fund lives off fees not returns.
Eventhough the two are related they are not the same thing.
Good yearly returns and fees may hide a systemic risk of an catastrophic event - leaving good returns and fees for say 5 years and then a single catastrophic year with zero fee resulting in plenty of fees but a compounded return of -100%.