The S&P 500 is up +10.7% year-to-date and is outperforming other asset classes including fixed-income (bonds) and commodities by a wide margin. Comparatively, the CRB Commodities Index, which measures 19 different commodities, is down nearly -6% so far this year. One of the most widely traded bond ETFs out there, the iShares Barclays 20+ Year Treasury Bond ETF (TLT), is up only +1.19% for the same time period.