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

Hecla Mining Co. rose $.01 or .3 percent, to $3.22.

Pan American Silver Corp. rose $.09 or .6 percent, to $15.06.

Silver Standard Resources Inc. rose $.33 or 3.5 percent, to $9.81.

Silver Wheaton rose $.32 or 1.2 percent, to $26.89.