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

Hecla Mining Co. fell $.12 or 1.8 percent, to $6.49.

Pan American Silver Corp. fell $.39 or 1.8 percent, to $21.35.

Silver Standard Resources Inc. fell $.47 or 2.9 percent, to $16.02.

Silver Wheaton fell $.67 or 1.7 percent, to $39.18.

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