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

Hecla Mining Co. unchanged at $4.40.

Pan American Silver Corp. fell $.20 or 1.4 percent, to $14.56.

Silver Standard Resources Inc. rose $.14 or 1.1 percent, to $12.35.

Silver Wheaton fell $.04 or .1 percent, to $27.13.

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