shares of autodesk inc adsk slipped 301 to 21000 thursday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 053 to 436349 and dow jones industrial average djia falling 029 to 3379466 autodesk inc closed 13439 short of its 52week high 34439 which the company reached on august 24th the stock underperformed when compared to some of its competitors thursday as apple inc aapl fell 020 to 16623 adobe inc adbe fell 257 to 45908 and synopsys inc snps fell 206 to 30884 trading volume 17 m remained 19307 below its 50day average volume of 17 m 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