shares of pioneer natural resources co pxd slid 175 to 14500 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 071 to 444808 and dow jones industrial average djia falling 079 to 3534328 this was the stocks third consecutive day of losses pioneer natural resources co closed 3037 below its 52week high 17537 which the company achieved on may 10th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as eog resources inc eog rose 008 to 6597 concho resources inc cxo fell 602 to 6560 and apa corp apa fell 152 to 1687 trading volume 17 m remained 629427 below its 50day average volume of 24 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