shares of southwest airlines co luv slid 894 to 3302 thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 064 to 453741 and dow jones industrial average djia falling 067 to 3528272 southwest airlines co closed 737 below its 52week high 4039 which the company achieved on august 15th the stock underperformed when compared to some of its competitors thursday as delta air lines inc dal fell 146 to 4575 united airlines holdings inc ual fell 240 to 5326 and american airlines group inc aal fell 113 to 1657 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