UGL - SPXS: Beware Of Negative Drift And Inflation Bias April, 04 2022 06:05 AM ProShares Ultra Gold Leveraged ETFs have a non-linear behavior. A drift dashboard with 22 leveraged ETFs. Some historical data on SPXS. Inflation is bad for short sellers and inverse ETFs' shareholders. For further details see: SPXS: Beware Of Negative Drift And Inflation Bias