shares of waste management inc wm slumped 047 to 16776 monday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 039 to 452279 and the dow jones industrial average djia rising 022 to 3458535 waste management inc closed 822 short of its 52week high 17598 which the company reached on august 18th the stock underperformed when compared to some of its competitors monday as ecolab inc ecl fell 047 to 18757 and republic services inc rsg rose 011 to 15014 trading volume 11 m remained 228584 below its 50day average volume of 14 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