NEW YORK (AP) â¿¿ Shares of some top silver companies were mixed at the close of trading:

Hecla Mining Co. fell $.01 or .2 percent, to $5.37.

Pan American Silver Corp. unchanged at $17.27.

Silver Standard Resources Inc. fell $.13 or .9 percent, to $14.86.

Silver Wheaton rose $.13 or .4 percent, to $34.08.

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