shares of valero energy corp vlo advanced 250 to 12211 tuesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 022 to 412873 and dow jones industrial average djia falling 047 to 3290959 this was the stocks second consecutive day of gains valero energy corp closed 2470 below its 52week high 14681 which the company achieved on june 8th the stock underperformed when compared to some of its competitors tuesday as phillips 66 psx rose 360 to 9141 and marathon petroleum corp mpc rose 306 to 10349 trading volume 32 m remained 21 million below its 50day average volume of 53 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