The Market Vectors Gold Miners ETF /zigman2/quotes/206399889/composite GDX +3.57% surged 1.7% in afternoon trade Wednesday to a 19-month high, as the shares of companies that mine gold continue to significantly outperform the price of the commodity the companies mine. The SPDR Gold ETF /zigman2/quotes/200593176/composite GLD +2.36% edged up 0.1%, below last Tuesday's intraday high of $120.35, and 2.2% below 13-month peak of $122.37 reached on March 4. The gold miners ETF (GDX) has now rocketed 84% over the past three months, while the gold ETF has advanced 14%. Tom Ord, editor of "The Ord Oracle" newsletter, said his charts suggest an upside target for GDX near $27, which is 14% above current levels. Among the GDX's 24 U.S.-listed components, 15 have more than doubled in three months, and three have at least tripled. The triplers are shares of First Majestic Silver Corp. /zigman2/quotes/202373250/composite AG +4.12% , Royal Gold Inc. /zigman2/quotes/203440759/composite RGLD +2.43% and Silver Wheaton Corp. /zigman2/quotes/205744453/composite SLV +8.67% .