shares of pioneer natural resources co pxd slumped 017 to 21040 wednesday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 024 to 3348272 and the sp 500 index spx falling 025 to 409038 this was the stocks second consecutive day of losses pioneer natural resources co closed 7806 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 wednesday as eog resources inc eog rose 063 to 12037 devon energy corp dvn rose 150 to 5353 and occidental petroleum corp oxy fell 040 to 6457 trading volume 23 m remained 609264 below its 50day average volume of 29 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