shares of perkinelmer inc pki shed 374 to 18176 monday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 005 to 3561925 and the sp 500 index spx falling 032 to 468294 perkinelmer inc closed 1024 below its 52week high 19200 which the company reached on september 23rd the stock underperformed when compared to some of its competitors monday as thermo fisher scientific inc tmo fell 033 to 63396 becton dickinson  co bdx fell 134 to 24529 and illumina inc ilmn fell 058 to 37715 trading volume 922814 eclipsed its 50day average volume of 693007 editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use