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

Hecla Mining Co. fell $.03 or .5 percent, to $6.32.

Pan American Silver Corp. fell $.08 or .4 percent, to $21.67.

Silver Standard Resources Inc. fell $.25 or 1.7 percent, to $14.64.

Silver Wheaton fell $.76 or 1.9 percent, to $38.73.

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