Determining the total value or market capitalization of a stock exchange is complex, as it can refer to the aggregate market value of all companies listed on that exchange or the corporate market valuation of the exchange operator itself. The market capitalization of a major global stock exchange—such as the New York Stock Exchange or the Hong Kong Stock Exchange—represents trillions of US dollars in aggregate listed equity value. However, the corporate entity that owns the exchange, such as the Intercontinental Exchange for the NYSE or the HKEX for Hong Kong, is traded as a company. The worth of these exchange operators is defined by their own market capitalization, which fluctuates daily based on trading volume, listing fees, and the overall health of the global financial economy.