shares of leidos holdings inc ldos dropped 067 to 9055 monday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 132 to 465527 and the dow jones industrial average djia rising 068 to 3513594 this was the stocks fourth consecutive day of losses leidos holdings inc closed 2320 below its 52week high 11375 which the company achieved on january 25th the stock underperformed when compared to some of its competitors monday as lockheed martin corp lmt fell 043 to 34123 northrop grumman corp noc rose 068 to 35639 and general dynamics corp gd rose 055 to 19444 trading volume 468166 remained 159523 below its 50day average volume of 627689 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