United States Oil Fund (NYSEArca: USO)

YTD: Up 0.6%

Decline From Pre-Crisis High: 71%

Comment: It may not be a bad thing that USO, which tracks front-month West Texas Intermediate crude contracts, is so far removed from its 2008 highs. After all, oil at $120, $130 or more per barrel can constrain demand and economic growth. Oil is one of the most volatile commodities, so USO certainly has the potential to rise again, but surging U.S. output could prevent the ETF from seeing its 2008 highs for a long, long time.  [Brent, WTI Spread Continues to Widen]