United States Oil Fund (NYSEArca: USO)
October returns: -5.4
Comment: West Texas Intermediate crude is down to a four-month low as U.S. inventories increased. We are currently in the midst of our own oil boom, bolstered by increased activity in the shale oil and hydraulic fracturing, or “fracking,” techniques. USO tracks WTI light, sweet crude oil futures and rolls front month futures, which makes the fund susceptible to the negative effects of contango.