shares of align technology inc algn slid 608 to 28255 tuesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 112 to 414558 and dow jones industrial average djia falling 069 to 3305551 align technology inc closed 8632 short of its 52week high 36887 which the company achieved on february 2nd 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