shares of valero energy corp vlo slumped 007 to 6020 friday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 081 to 444167 and the dow jones industrial average djia rising 065 to 3512008 this was the stocks sixth consecutive day of losses valero energy corp closed 2475 short of its 52week high 8495 which the company achieved on june 3rd the stock demonstrated a mixed performance when compared to some of its competitors friday as phillips 66 psx fell 048 to 6595 marathon petroleum corp mpc rose 100 to 5477 and hollyfrontier corp hfc rose 220 to 2886 trading volume 49 m eclipsed its 50day average volume of 43 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