shares of valero energy corp vlo shed 238 to 13637 wednesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 028 to 414760 and the dow jones industrial average djia rising 011 to 3412805 this was the stocks third consecutive day of losses valero energy corp closed 1402 short of its 52week high 15039 which the company achieved on january 27th the stock underperformed when compared to some of its competitors wednesday as exxon mobil corp xom fell 030 to 11607 and chevron corp cvx fell 105 to 16901 trading volume 40 m eclipsed its 50day average volume of 39 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