Gold, silver stocks and ETFs sank in morning trading. ProShares Ultra Silver fell 18%; iShares Silver Trust fell 9%; First Majestic Silver, Harmony Gold, Endeavour Silver, Gold Fields, Coeur Mining, and Hecla Mining fell 8%; Anglogold Ashanti, Kinross, Pan American Silver, and Fortuna Silver Mines fell 7%; Eldorado fell 6%.