Buffett's market-beating skills revealed

New study finds Oracle of Omaha has outperformed every long-lived U.S. stock and mutual fund

Dec 6, 2013 @ 8:12 am

Warren E. Buffett isn't just a great investor. He's the best investor, an economic study has found.

An index measuring returns adjusted by price fluctuations shows the billionaire chairman and chief executive of Berkshire Hathaway Inc. (BRK/A) has done better than every long-lived U.S. stock and mutual fund.

Looking at all U.S. stocks from 1926 to 2011 that have been traded for more than 30 years, a paper published this week by the National Bureau of Economic Research calculated that Mr. Buffett's so-called Sharpe ratio is 0.76 since 1976. That was about twice the stock market's 0.39.

The ratio is also larger than all 196 U.S. mutual funds that have been around for 30 years. The median Sharpe ratio for them is 0.37.

The review of Mr. Buffett's investments concluded he has been rewarded for his use of leverage, coupled with a focus on cheap, safe, quality shares.

The study said Mr. Buffett is willing to take on borrowing to finance investment, then picks stocks that have low volatility, are cheap — with low price-to-book ratios — and are high quality, meaning they are profitable and have high payouts.

By breaking down Berkshire Hathaway's portfolio into ownership of publicly traded stocks versus wholly owned private companies, the authors also found the tradable equities performed best. That suggested to them that Mr. Buffett's returns are due more to stock selection than to the pressure he puts on companies he has stakes in to improve their management.

“Buffett's performance appears not to be luck, but an expression that value and quality investing can be implemented,” said Andrea Frazzini and David Kabiller of AQR Capital Management LLC and Lasse H. Pedersen of Copenhagen Business School. “If you travel back in time and pick one stock in 1976, Berkshire would be your pick.”

(Bloomberg News)

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