shares of northrop grumman corp noc slid 193 to 35888 tuesday on what proved to be an allaround poor 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 this was the stocks second consecutive day of losses northrop grumman corp closed 2015 short of its 52week high 37903 which the company reached on june 4th the stock underperformed when compared to some of its competitors tuesday as lockheed martin corp lmt fell 191 to 34920 boeing co ba fell 180 to 21424 and general dynamics corp gd fell 003 to 20239 trading volume 863141 eclipsed its 50day average volume of 570064 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