#exchange.workplace  a workplace for buying and selling; open only to members
  supertype:  #workplace__work  a place where work is done; "he arrived at work early today"
  subtype:  #commodity_exchange__commodityexchange__commoditiesexchange__commoditiesmarket  an exchange for buying and selling commodities for future delivery
     subtype:  #futures_exchange__futuresexchange__futures_market__futuresmarket  a commodity exchange where futures contracts are traded
  subtype:  #corn_exchange  an exchange where grains are bought and sold
  subtype:  #stock_exchange__stockexchange__stock_market__stockmarket__securities_market  an exchange where security trading is conducted by professional stockbrokers
     subtype:  #American_Stock_Exchange__AMEX__Curb  a stock exchange in New York
     subtype:  #Bourse  the stock exchange in Paris
     subtype:  #curb_market  a stock market for trading in securities not listed on the New York Stock Exchange
     subtype:  #New_York_Stock_Exchange__N._Y._Stock_Exchange__NYSE__big_board__bigboard  a stock exchange in New York
     subtype:  #over-the-counter_market__OTC_market  a stock exchange where securities transactions are made via telephone and computer rather than on the floor of an exchange

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