shares of public storage psa advanced 163 to 33354 wednesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 026 to 468867 and dow jones industrial average djia falling 058 to 3593105 public storage closed 741 below its 52week high 34095 which the company achieved on november 3rd the stock outperformed some of its competitors wednesday as extra space storage inc exr rose 125 to 20127 life storage inc lsi rose 088 to 13273 and ps business parks inc psb rose 077 to 17775 trading volume 646612 eclipsed its 50day average volume of 607226 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