shares of costco wholesale corp cost shed 140 to 50410 thursday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 138 to 409041 and dow jones industrial average djia falling 126 to 3369685 costco wholesale corp closed 10817 below its 52week high 61227 which the company achieved on april 7th despite its losses the stock outperformed some of its competitors thursday as amazoncom inc amzn fell 298 to 9815 and walmart inc wmt fell 157 to 14427 trading volume 15 m remained 637583 below its 50day average volume of 21 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