Silver companies shares mixed at 10 a.m.

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

Hecla Mining Co. fell $.05 or 1.5 percent, to $3.23.

Pan American Silver Corp. rose $.04 or .4 percent, to $9.43.

Silver Standard Resources Inc. fell $.06 or 1.0 percent, to $5.25.

Silver Wheaton fell $.15 or .8 percent, to $19.44.