ETFS Physical Silver Shares ( SIVR) -1.7% Precious metals have spent most of 2012 powering higher alongside stocks. During Friday's trading action, however, a number of notables are struggling to keep up. In addition to bullion-backed funds like SIVR and the iShares Gold Trust ( IAU), miner-tracking funds like the Market Vectors Junior Gold Miners ETF ( GDXJ) are also taking losses. All prices as of 2:14 PM EST. Written by Don Dion in Williamstown, Mass.