Definition:
GLL, the UltraShort Gold ProShares ETF acts as an inverse ETF by tracking twice the inverse performance of the gold bullion as measured by the US Dollar p.m. fixing price for delivery in London. The gold ETF is constructed to rise as the index falls and vice versa.
If you'd like to see more related funds, here is a thorough list of precious metals ETNs and ETFs. A List of Gold ETFs
If you'd like to see more inverse ETFs, here is a thorough list of inverse ETFs and ETNs.
