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

Hecla Mining Co. fell $.08 or 1.2 percent, to $6.55.

Pan American Silver Corp. fell $.50 or 2.2 percent, to $22.12.

Silver Standard Resources Inc. fell $.55 or 3.5 percent, to $15.05.

Silver Wheaton fell $1.01 or 2.5 percent, to $40.13.

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