shares of valero energy corp vlo sank 014 to 11262 wednesday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 183 to 397987 and the dow jones industrial average djia rising 140 to 3158128 this was the stocks second consecutive day of losses valero energy corp closed 3419 short of its 52week high 14681 which the company reached on june 8th the stock demonstrated a mixed performance when compared to some of its competitors wednesday as phillips 66 psx fell 051 to 8632 and marathon petroleum corp mpc fell 012 to 9834 trading volume 31 m remained 998817 below its 50day average volume of 40 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