Shares of gold miners were broadly higher in afternoon trading Tuesday, as worries about escalating U.S.-China trade tensions, data showing a surprise contraction in the U.S. manufacturing sector and uncertainty surrounding Brexit has helped fuel demand for safe-haven gold. The VanEck Vectors Gold Miners ETF /zigman2/quotes/206399889/composite GDX +0.15% rallied 2.2% with 39 of 44 components gaining ground. Among the more active U.S.-listed shares, Hecla Mining Co. /zigman2/quotes/201669377/composite HL -0.50% hiked up 5.3%, Coeur Mining Inc. /zigman2/quotes/202240707/composite CDE +1.25% climbed 2.7%, Newmont Goldcorp Corp. /zigman2/quotes/205356474/composite NEM +0.34% advanced 1.9% and AngloGold Ashanti Ltd. /zigman2/quotes/204252891/composite AU +1.21% tacked on 1.5%, while Harmony Gold Mining Co. Ltd. /zigman2/quotes/203958044/composite HMY +0.63% lost 1.2%. Meanwhile, SPDR Gold Shares /zigman2/quotes/200593176/composite GLD -0.11% rose 1.4% toward the highest close since April 2013, while continuous gold futures /zigman2/quotes/210034565/delayed GC00 -0.05% gained 1.7%, also toward a 6 1/2-year high. The gold miners ETF has now soared 64.5% over the past 12 months, while the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.39% has slipped 0.2%.