At the time of this writing, the price of silver is down over $31/oz (27 percent) on the day, with gold posting losses of $480/oz (8 percent). These are huge losses, growing larger as the sell-off creates its own momentum as markets approach the Friday close. With this historic sell-off during American trading hours, gold is now trading below the $4,900/oz level, with silver trading below $84/oz. These represent the steepest dollar declines in the two metals since 2011, after gold and silver peaked above $1,900/oz and $49.50/oz, respectively. On September 23, 2011, silver posted a single-day decline of 16.5 percent, with gold sliding by 6 percent on the day. The case of 1980 was even more extreme: on January 22, 1980, gold prices declined by more than 13 percent; a couple of months later, on March 27, 1980, silver prices were slashed in half. As for today's sell-off, it comes just days after silver and gold set all-time highs (at least nominally), when the metals rose to around $1...