The investment objective of USO is for the daily changes in percentage terms of its shares» NAV to reflect the daily changes in percentage terms of the spot price of light, sweet crude oil delivered to Cushing, Oklahoma, as measured by the daily changes in price of USO's Benchmark Oil Futures Contract, less USO's expenses. (money.stackexchange.com)
United States Oil Fund (USO), for instance, tries to track the spot price of light, sweet crude oil by buying oil - futures contracts. (kiplinger.com)
With oil back up at USD 50 (as quoted by the NYMEX light sweet crude oil futures), the energy sector (15 %) of the S&P U.S. Issued High Yield Corporate Bond Index returned 5.73 % in February. (indexologyblog.com)