shares of align technology inc algn inched 035 higher to 33143 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 047 to 438871 and dow jones industrial average djia falling 072 to 3405387 align technology inc closed 3744 short of its 52week high 36887 which the company reached on february 2nd trading volume 529940 remained 207827 below its 50day average volume of 737767 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