shares of pioneer natural resources co pxd slipped 308 to 22439 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 120 to 378322 and dow jones industrial average djia falling 110 to 3287571 the stocks fall snapped a twoday winning streak pioneer natural resources co closed 6407 below its 52week high 28846 which the company reached on may 31st despite its losses the stock outperformed some of its competitors wednesday as eog resources inc eog fell 354 to 12740 devon energy corp dvn fell 372 to 6089 and occidental petroleum corp oxy fell 350 to 6208true trading volume 13 m remained 972578 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