Physically backed precious metals exchange traded funds gapped up Tuesday as the dollar sank on news that Greece secured its second bailout. SPDR Gold Trust (GLD) gapped up 2.2% to 171.02 in average volume. IShares Silver Trust (SLV) jumped 3.4% to 33.38 in above average volume. Market Vectors Gold Miners ETF (GDX) climbed 3.1% 55.82. Global X Silver Miners ETF (SIL) rose 1.8% to 24.55. In the futures markets, gold picked up 1.4% to 1,760.10 an