shares of costco wholesale corp cost inched 015 higher to 51559 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 061 to 411108 and dow jones industrial average djia falling 010 to 3389102 costco wholesale corp closed 9668 below its 52week high 61227 which the company achieved on april 7th the stock outperformed some of its competitors monday as amazoncom inc amzn fell 117 to 10218 and walmart inc wmt fell 073 to 14068 trading volume 17 m remained 520576 below its 50day average volume of 23 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