shares of perkinelmer inc pki dropped 036 to 18982 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 034 to 452003 and dow jones industrial average djia falling 076 to 3510000 the stocks fall snapped a threeday winning streak perkinelmer inc closed 077 below its 52week high 19059 which the company reached on september 2nd the stock demonstrated a mixed performance when compared to some of its competitors tuesday as thermo fisher scientific inc tmo rose 019 to 56917 becton dickinson  co bdx remained unchanged and illumina inc ilmn fell 114 to 46165 trading volume 546859 remained 154403 below its 50day average volume of 701262 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