shares of iron mountain inc irm shed 303 to 4544 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 190 to 456700 and dow jones industrial average djia falling 186 to 3448372 iron mountain inc closed 414 below its 52week high 4958 which the company achieved on september 3rd the stock underperformed when compared to some of its competitors tuesday as fiserv inc fisv fell 097 to 9652 automatic data processing inc adp fell 212 to 23089 and equifax inc efx fell 190 to 27865 trading volume 41 m eclipsed 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