The ProShares Ultra Bloomberg Crude Oil (NYSEArca: UCO), which attempts to deliver twice the daily performance of the Bloomberg Crude Oil Sub-Index, has added almost $84.5 million over the five days ended Monday.

Speaking of leveraged ETFs, the Direxion Daily Energy Bear 3X Shares (NYSEArca: ERY) is Direxion’s top-performing bearish ETF this month and has surged more than 32% over the past month. Still, investors have pulled money from that ETF while adding new funds to ERY bullish equivalent, the Direxion Daily Energy Bull 3X Shares (NYSEArca: ERX), over the past 30 days, according to issuer data.

Energy Select Sector SPDR