shares of pfizer inc pfe slid 105 to 5354 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 097 to 453276 and dow jones industrial average djia falling 096 to 3502865 this was the stocks fifth consecutive day of losses pfizer inc closed 817 below its 52week high 6171 which the company reached on december 20th the stock underperformed when compared to some of its competitors wednesday as johnson  johnson jnj fell 031 to 16658 merck  co inc mrk fell 031 to 8129 and novartis ag adr nvs fell 077 to 8885 trading volume 273 m remained 156 million below its 50day average volume of 429 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