shares of alaska air group inc alk slid 320 to 5389 tuesday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 039 to 470090 and the dow jones industrial average djia rising 015 to 3614222 alaska air group inc closed 2036 below its 52week high 7425 which the company reached on april 7th the stock underperformed when compared to some of its competitors tuesday as southwest airlines co luv fell 311 to 4760 delta air lines inc