by Clifford Asness, Ph. D. AQR Capital Management, Inc.
My last few entries highlighted some recent AQR papers with hopefully some interesting commentary. I know itâs a little weak to do that again so soon, but some of the papers are just too cool not to opine on. I have a particular weakness for pricking the bubble of conventional wisdom, and, much geekier, for arguments that hinge on the subtleties and great value of true diversification. This one has got it all, and I couldnât resist discussing it.
There is a common belief that goes something like this: âSure active stock picking doesnât work, but in fixed income, active management really shines.â Various reasons are given for this including the notion that fixed income is, for some reason, a less efficient market or that the benchmarks are worse investments. In other words, fixed income is ripe for the value-add that comes from traditional active management.
The problem is that any perceived alpha has been, at least to a great degree, due to a passive long-term overweight of credit.1 If we found equity managers out-performed largely because they were strategically, not tactically, higher beta than their benchmarks, would you get excited and pay a lot for that? I hope not. For fixed income managers, the credit exposure doesnât necessarily eliminate all of their alpha, but once you account for the credit exposure, fees and other simple factor exposures (for example, short volatility exposure) there may not be much left.
It gets worse. The reason most invest in fixed income is because itâs a positive expected return asset that offers diversification from equity risk, which dominates most investorsâ portfolios. Well, credit is the part of fixed income that is highly correlated with equities. As a result, not only is there less alpha than people think, the whole premise for investing in fixed income is compromised on account of the average2 active managerâs passive overweight to credit as it non-trivially raises fixed incomeâs correlation to equities.
So, once again fans of active management are just wrong, and Jack Bogle is just right.
Except⊠Yeah, except for the stuff AQR and other quants believe in (I know, there he goes again). We do find, again much like in equities, expensive traditional active fixed income management is a bust; however, the same factors we find effective elsewhere (value, momentum, carry, defensive/quality)3  show up in bonds. So, not surprisingly, we think there is hope, but itâs not because âactive management works in bonds,â but because âthe same basic things that work everywhere also work in bonds.â Basically, donât go traditional âactiveâ in fixed income, go factor (and make sure the fees fit that!). Thatâs your self-serving message from me for the day.
This post was originally published at AQR Capital
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