shares of iron mountain inc irm advanced 261 to 5267 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 015 to 385576 and dow jones industrial average djia falling 028 to 3181914 the stocks rise snapped a twoday losing streak iron mountain inc closed 594 below its 52week high 5861 which the company achieved on april 21st the stock demonstrated a mixed performance when compared to some of its competitors monday as prologis