United States Oil Fund, LP (USO) is an exchange-traded fund in the Commodities Focused category. It has $1.90B in assets, an expense ratio of 0.86% and a 0.00% dividend yield. USO seeks to achieve its investment objective by investing primarily in futures contracts for light, sweet crude oil, other types of crude oil, diesel-heating oil, gasoline, natural gas, and other petroleum-based fuels.