shares of pioneer natural resources co pxd slumped 078 to 20630 tuesday on what proved to be an allaround mixed trading session for the stock market with the sp 500 index spx remaining mostly unchanged at 420552 and the dow jones industrial average djia falling 015 to 3304278 pioneer natural resources co closed 8216 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 fell 119 to 10881 devon energy corp dvn fell 231 to 4696 and occidental petroleum corp oxy fell 059 to 5859 trading volume 21 m remained 106562 below its 50day average volume of 22 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