shares of diamondback energy inc fang slid 217 to 12766 thursday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 017 to 413062 and dow jones industrial average djia falling 066 to 3330951 this was the stocks second consecutive day of losses diamondback energy inc closed 4129 short of its 52week high 16895 which the company achieved on november 15th the stock underperformed when compared to some of its competitors thursday as eog resources inc eog fell 145 to 11053 pioneer natural resources co pxd fell 091 to 20720 and devon energy corp dvn fell 177 to 4726 trading volume 22 m remained 114024 below its 50day average volume of 23 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