Shares of some top silver companies are down at 1 p.m.:

Hecla Mining Co. fell $.10 or 2.9 percent, to $3.21.

Pan American Silver Corp. fell $.47 or 3.1 percent, to $14.90.

Silver Standard Resources Inc. fell $.34 or 3.6 percent, to $9.14.

Silver Wheaton fell $.25 or .9 percent, to $26.39.