USOILCHECK AND UPDTE. The underlying instrument for USOIL is the light sweet Crude Oil Futures contract which is traded on the CME . West Texas Intermediate (WTI), also known as Texas light sweet, is a grade of crude oil used as a benchmark in oil pricing.
Historically, WTI has traded closely to Brent and the OPEC basket, but it currently is discounted against Brent crude oil. Historical price data for WTI can be found at the Energy Information Administration of the Department of Energy.
