shares of public storage psa inched 027 higher to 29567 friday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 110 to 391664 and dow jones industrial average djia falling 119 to 3186198 this was the stocks third consecutive day of gains public storage closed 12609 short of its 52week high 42176 which the company reached on april 21st the stock outperformed some of its competitors friday as extra space storage inc exr fell 028 to 15952 and cubesmart cube fell 062 to 4636 trading volume 22 m eclipsed its 50day average volume of 11 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