DGP, a double-headed gold ETN owned by Power Shares DB, tracks the gold futures price and fluctuates in the same direction as the gold futures price. Double leverage means that the gold futures price rises 1%, corresponding to the ETN index rising by about 2%.

ProShares' double-bull gold ETF ugl tracks the spot price of gold (London gold) and fluctuates in the same direction as the spot price of gold. Double leverage means that the spot price of gold rises 1%, corresponding to the ETF index rising by about 2%.