Friday, May 07, 2010

Buffett the lazy way

But why not just buy what Warren buys? I set out in this writing to examine whether following Berkshire Hathaway's investments utilizing Form 13Fs could offer the investor the opportunity to piggyback on Buffett's stock picks, and consequently, achieve outsized excess returns.

Buffett's current clone portfolio would be: Coca-Cola Company (KO), Wells Fargo (WFC), American Express (AXP), Procter & Gamble (PG), Kraft Foods (KFT), Wal-Mart Stores (WMT), Wesco Financial (WSC), ConocoPhillips (COP), Johnson & Johnson (JNJ), and U.S. Bancorp (USB).

Buffett returns more than 8% a year, which doesn't sound that spectacular but $100,000 invested in the Buffett portfolio would be worth approximately $240,000 today vs. about $100,000 invested in the S&P500. About 85% of Buffet's portfolio is concentrated in his top ten holdings. Volatility was low, surprising given that the portfolio contained only 10 holdings.

If you ran a mutual fund with these numbers you would be one of the best performing mangers in the U.S. over the time period. A recent academic paper has examined the strategy for Buffett all the way back to 1976 and found results consistent with mine. From the abstract: Contrary to popular belief, we find Berkshire Hathaway invests primarily in large-cap growth rather than "value" stocks.

Over the period the portfolio beat the benchmarks in 27 out of 31 years, on average exceeding the S&P 500 Index by 11.14%. We find that Berkshire Hathaway's portfolio is concentrated in relatively few stocks with the top five holdings averaging 73% of the portfolio value. While increased volatility is normally associated with higher concentration we show the volatility of the portfolio is driven by large positive returns and not downside risk.

-- via Warren Buffett International Fan Club

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