NEW YORK (AP) â¿¿ Shares of some top silver companies are down at 10 a.m.:

Hecla Mining Co. fell $.06 or .9 percent, to $6.77.

Pan American Silver Corp. fell $.79 or 3.5 percent, to $21.67.

Silver Standard Resources Inc. fell $.30 or 1.8 percent, to $16.46.

Silver Wheaton fell $.56 or 1.4 percent, to $39.35.

Copyright 2011 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.