SCO is a solid bet for investors looking for an inverse oil fund. As an inverse ETF, SCO is intended as a short-term tactical investment to be held only for its one-day exposure period, it's not appropriate for buy-and-hold investors. Daily compounding of SCO's inverse crude oil returns can lead to the fund's returns varying significantly from the intended multiple, so longer term investors must monitor and rebalance their position. SCO's futures-based index means that its returns reflect price appreciation on its futures contracts as well as any return from rolling those futures contracts. The underlying index provides exposure to three separate contracts at equal-weighting of 1/3 each. The first portion follows monthly roll schedule, while the second and third portion holds June and December contract that are rolled annually each March and September, respectively. Prior to September 16, 2020, the fund tracked the Bloomberg WTI Crude Oil Subindex.