Shares of some top silver companies are down at 10 a.m.:

Hecla Mining Co. fell $.04 or 1.1 percent, to $3.24.

Pan American Silver Corp. fell $.14 or 1.0 percent, to $14.22.

Silver Standard Resources Inc. fell $.21 or 2.2 percent, to $9.16.

Silver Wheaton fell $.26 or 1.0 percent, to $24.75.