It's been a really, really tough year for returns. According to data from Societe Generale, the best-performing asset class of 2015 has been stocks, whose meager 2 percent total return (that is, including dividends) still surpasses those of long-term bonds, short-term Treasury bills and commodities.
These minimal gains make 2015 the worst year for finding returns since 1937, when the cash-like 3-month Treasury bill beat out other major asset classes with a return of 0.3 percent.
Famed investor Warren Buffett is seeing his worst year since 2008, with Berkshire Hathaway shares down more than 11 percent year to date. Bill Ackman of Pershing Square Capital sent a letter to investors in December that said 2015 may be the fund's worst year since it was founded in 2004.
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