shares of pioneer natural resources co pxd slid 145 to 20594 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 200 to 399734 and dow jones industrial average djia falling 206 to 3312959 this was the stocks fourth consecutive day of losses pioneer natural resources co closed 8252 below its 52week high 28846 which the company achieved on may 31st the stock demonstrated a mixed performance when compared to some of its competitors tuesday as eog resources inc eog rose 068 to 11923 devon energy corp dvn rose 075 to 5373 and occidental petroleum corp oxy fell 150 to 5982 trading volume 29 m eclipsed its 50day average volume of 20 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