shares of vulcan materials co vmc dropped 063 to 17244 thursday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 060 to 412979 and dow jones industrial average djia falling 033 to 3378662 vulcan materials co closed 2532 short of its 52week high 19776 which the company reached on february 15th trading volume 562608 remained 287678 below its 50day average volume of 850286 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