Commodities drew in a hefty amount of new investment dollars in 2012, but their less-than-stellar performance raises questions about 2013.

The money invested in commodity funds was up 86 percent to $20.8 billion dollars in 2012, according to EPFR Global. But in terms of broad performance, the S&P Goldman Sachs Commodity Index is down 1 percent so far this year, on track for its first annual loss since 2008.