shares of pioneer natural resources co pxd shed 106 to 18381 tuesday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 026 to 3639821 and the sp 500 index spx falling 010 to 478635 pioneer natural resources co closed 1283 below its 52week high 19664 which the company reached on october 11th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as eog resources inc eog fell 062 to 9022 concho resources inc cxo fell 602 to 6560 and apa corp apa fell 014 to 2793 trading volume 849485 remained 10 million below its 50day average volume of 19 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