shares of costco wholesale corp cost dropped 000 to 51259 friday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 145 to 428237 and the dow jones industrial average djia rising 212 to 3376276 costco wholesale corp closed 5216 below its 52week high 56475 which the company reached on august 18th the stock underperformed when compared to some of its competitors friday as amazoncom inc amzn rose 121 to 12425 and walmart inc wmt rose 096 to 14882 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