shares of valero energy corp vlo slumped 032 to 13177 wednesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 165 to 393697 and dow jones industrial average djia falling 163 to 3203011 the stocks fall snapped a twoday winning streak valero energy corp closed 1862 short of its 52week high 15039 which the company reached on january 27th despite its losses the stock outperformed some of its competitors wednesday as exxon mobil corp xom fell 229 to 10459 and chevron corp cvx fell 203 to 15607 trading volume 39 m remained 334597 below 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