shares of phillips 66 psx slipped 208 to 7068 thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 058 to 447000 and dow jones industrial average djia falling 054 to 3521312 the stocks fall snapped a threeday winning streak phillips 66 closed 2366 short of its 52week high 9434 which the company achieved on june 10th the stock underperformed when compared to some of its competitors thursday as exxon mobil corp xom fell 135 to 5471 chevron corp cvx fell 131 to 9722 and marathon petroleum corp mpc fell 092 to 5809 trading volume 25 m remained 745849 below its 50day average volume of 33 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