Silver on the Comex division of the New York Mercantile Exchange dropped 13 percent on Monday as investors placed sell orders following the CME Group raising its margin requirements for the second time in a week.
Silver futures for May delivery were down $2.304, or 4.7 percent, at $46.295 an ounce and earlier fell as low as $42.20. That represents the largest single intraday fall since October 2008.
This was the second margin increase in the span of one week. [The CME Group] is clearly taking steps to curb speculation.