shares of blackberry ltd bb slid 663 to 507 thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 325 to 366677 and dow jones industrial average djia falling 242 to 2992707 the stocks fall snapped a twoday winning streak blackberry ltd closed 880 short of its 52week high 1387 which the company achieved on june 18th the stock underperformed when compared to some of its competitors thursday as crowdstrike holdings inc cl a crwd fell 434 to 15721 vmware inc vmw fell 389 to 11617 and citrix systems inc ctxs fell 318 to 8976 trading volume 82 m remained 660582 below its 50day average volume of 89 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