shares of northrop grumman corp noc slid 135 to 45446 tuesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 038 to 373548 and dow jones industrial average djia falling 050 to 3036483 this was the stocks second consecutive day of losses northrop grumman corp closed 3784 below its 52week high 49230 which the company achieved on june 7th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as lockheed martin corp lmt fell 183 to 41617 boeing co ba rose 544 to 12216 and general dynamics corp gd fell 075 to 21590 trading volume 818179 remained 1540 below its 50day average volume of 819719 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