shares of f5 inc ffiv slipped 304 to 14485 thursday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 030 to 379038 and dow jones industrial average djia falling 046 to 3063017 this was the stocks fifth consecutive day of losses f5 inc closed 10415 below its 52week high 24900 which the company achieved on december 29th the stock underperformed when compared to some of its competitors thursday as cisco systems inc csco fell 087 to