Notably, WisdomTree Bloomberg US Dollar Bullish ETF (USDU) was up 6.6% in the last one year and is expected to extend gains in 2016 as well. Click to get this free report WISDMTR-BB USDB (USDU): ETF Research Reports SPDR-GOLD TRUST (GLD): ETF Research Reports MKT VEC-GOLD MI (GDX): ETF Research Reports To read this article on Zacks.com click here. As expected, gold saw its third consecutive annual decline in 2015 crushed heavily by the strength of the greenback in the wake of the Fed policy tightening, demand-supply imbalances and tepid global inflation (especially in the developed markets).