shares of phillips 66 psx dropped 090 to 10081 tuesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 063 to 413215 and dow jones industrial average djia falling 067 to 3299012 phillips 66 closed 146 below its 52week high 10227 which the company reached on may 27th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as exxon mobil corp xom fell 163 to 9600 chevron corp cvx fell 203 to 17466 and marathon petroleum corp mpc fell 030 to 10179 trading volume 55 m eclipsed its 50day average volume of 42 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