shares of diamondback energy inc fang rose 318 to 8262 friday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 091 to 443299 and dow jones industrial average djia falling 048 to 3458488 diamondback energy inc closed 1991 short of its 52week high 10253 which the company achieved on july 1st the stock outperformed some of its competitors friday as pioneer natural resources co pxd rose 001 to 15705 occidental petroleum corp oxy fell 143 to 2694 and concho resources inc cxo fell 602 to 6560 trading volume 67 m eclipsed 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