ProShares Ultra Bloomberg Crude Oil 2X ETF (UCO)

[Pandion]

All you have to do is scroll up to find this:

"Recent global developments affecting crude oil markets and crude oil futures contracts have dramatically increased volatility and even resulted in a negative price for the May 2020 WTI crude oil futures contract. As a result, investors in the oil funds may be subject to significant volatility and unexpected losses. In response to these conditions, each oil fund has modified certain of its investment strategies and the performance of each oil fund may differ from 2x or -2x, as applicable, of the daily performance of its benchmark. The fund does not track the spot price of WTI crude oil."