shares of phillips 66 psx shed 397 to 6964 monday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 091 to 466897 and dow jones industrial average djia falling 089 to 3565095 the stocks fall snapped a twoday winning streak phillips 66 closed 2470 below its 52week high 9434 which the company achieved on june 10th the stock underperformed when compared to some of its competitors monday as exxon mobil corp xom fell 219 to 6163 chevron corp cvx fell 208 to 11588 and marathon petroleum corp mpc fell 295 to 6181 trading volume 25 m remained 709411 below its 50day average volume of 32 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