shares of iron mountain inc irm inched 077 higher to 5483 monday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 143 to 399056 and the dow jones industrial average djia rising 158 to 3400504 iron mountain inc closed 378 below its 52week high 5861 which the company achieved on april 21st the stock underperformed when compared to some of its competitors monday as prologis inc pld rose 147 to 11803 international business machines corp ibm rose 147 to 14921 and digital realty trust inc dlr rose 128 to 10833 trading volume 12 m remained 101375 below its 50day average volume of 13 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