Many investors are starting to question whether a short-term low has been established in the oil markets and a rebound in USO may set the stage for additional interest in energy stocks as well. United States Oil Fund (NYSE: USO ) Oil prices rose over 5 percent on Friday and appear to have found an area of temporary support on the chart. USO tracks the daily spot price of West Texas Intermediate light, sweet crude oil and experienced a six-month decline as high inventories and weak demand have led to deflation in energy prices.