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January 25, 2012

Comments

how do you address the selection bias inherent in hedge fund indexes?

In addition to selection bias, there is a lot of evidence on autocorrelations that cause hedge funds to be less volatile than they actually are. There is a great article called: "Do Hedge Funds Hedge" in the Journal of Portfolio Management which addresses these head-on (they use the TASS/Tremont index rather than HFR....but you can show the same effect with both): http://faculty.chicagobooth.edu/john.cochrane/teaching/35150_advanced_investments/asness_crail_liew_hedge_funds_hedge_JPM.pdf

Thanks for the comments. Raw monthly reported returns certainly have their limitations in showing how volatile hedge funds are, due to return smoothing and other reasons.

However, more recent and comprehensive empirical research indicates that, even after controlling for backfill and survivorship biases, more actively managed funds are indeed less volatile (have higher Sharpe ratios). See Titman and Tiu's 2010 article, "Do the Best Hedge Funds Hedge?", here:
http://rfs.oxfordjournals.org/content/24/1/123.full.pdf

"Low volatility means little if returns turn out to be negative, as they were in 2011."

That's the most important phrase in the entire post and it pretty much sums everything up.
2011 should definitely be a lesson to all of those who are planning on investing in hedge funds this year.

Thanks for the comments. Raw monthly reported returns certainly have their limitations in showing how volatile hedge funds are, due to return smoothing and other reasons.

However, more recent and comprehensive empirical research indicates that, even after controlling for backfill and survivorship biases, more actively managed funds are indeed less volatile (have higher Sharpe ratios). See Titman and Tius 2010 article, Do the Best Hedge Funds Hedge?, here:
http://rfs.oxfordjournals.org/content/24/1/123.full.pdf
+1

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