Silver mining company shares and related assets plunged Wednesday as the price of silver fell and investors piled into stocks.

The decision Tuesday by the Swiss central bank to peg the value of its currency to the euro and then aggressively defend the euro plus the decision by Germany's Constitutional Court to permit aid to weak European nations encouraged investors.

Silver for December delivery on the Comex divsion of the New York Mercantile Exchange fell 1.94 percent to $41.06 from $41.87. Silver for immediate delivery retreated 60 cents to $41.10 from $41.70.

The price of iShares Silver Trust, the largest exchanged-traded fund back by physical silver, fell in premarket trading by 2.44. On Tuesday it was down 2.7 percent.

In premarket trading, Endeavour Silver Corp. dropped 3.82 percent, Silver Wheaton Corp. was down 2.1 percent, Hecla Mining Co. fell 2.64 percent, Silvercorp Metals Inc. retreated 2 percent, Pan American Silver Corp. gave up 2.36 percent.

U.S. stock futures rose, indicating that equities were close to breaking a three-day losing streak.