shares of chipotle mexican grill inc cmg shed 299 to 156926 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 200 to 399734 and dow jones industrial average djia falling 206 to 3312959 this was the stocks third consecutive day of losses chipotle mexican grill inc closed 18530 below its 52week high 175456 which the company achieved on september 12th the stock underperformed when compared to some of its competitors tuesday as mcdonalds corp mcd fell 053 to 26855 starbucks corp sbux fell 217 to 10478 and yum brands inc yum fell 063 to 13061 trading volume 272114 remained 16507 below its 50day average volume of 288621 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