That said...there are many funds like them, those in particular are 3x leveraged crude oil ETF's. That means if the price of oil rises 1%, UWTI rises 3%. If it falls 1%, DWTI rises 3%. Crude oil as a market has "predictable volatility", that (simply) means that within a given day, the price will rise/fall repeatedly within a sane range(given no extraordinary circumstances). Identify this range, and buy and sell on both sides(short and long) to take advantage of the range. Follow the big money(banks), and you'll be just fine. Never go against the flow, you will (virtually) always lose.