 Precious metals exchange traded funds are regaining their luster as three-decade high inflation pushed investors toward hard assets that help protect their purchasing power. Over the past month, the iShares Silver Trust SLV was up 11.9, the Sprott Physical Silver Trust PSLV added 11.8, the SPDR Gold Shares NYSEArca: GLD was 6.0 higher and the Sprott Physical Gold Trust PHYS . 