shares of ametek inc ame shed 326 to 13400 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 070 to 389193 and dow jones industrial average djia falling 087 to 3187457 ametek inc closed 1406 below its 52week high 14806 which the company achieved on february 6th the stock underperformed when compared to some of its competitors wednesday as emerson electric co emr fell 308 to 8053 amphenol corp cl a aph fell 201 to