shares of gartner inc it advanced 136 to 26910 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 028 to 411863 and dow jones industrial average djia falling 014 to 3279840 this was the stocks fourth consecutive day of gains gartner inc closed 9990 short of its 52week high 36900 which the company reached on november 2nd the stock demonstrated a mixed performance when compared to some of its competitors monday as nielsen holdings plc nlsn fell 029 to 2388 and forrester research inc forr rose 224 to 4753 trading volume 575421 eclipsed its 50day average volume of 468354 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