This paper reviews the origin and development of the stock market in Hong Kong. The first formal stock exchange, the Association of Stockbrokers in Hong Kong, was formed in 1891. However, the activities of the stock exchange are generally regarded as insignificant until the 1970s. Since the 1980s, there have been a number of major reforms and some significant developments. These include the unification of four stock exchanges; the establishment of the Securities and Futures Commission; the closer economic relations with Mainland China; the merger of the Hong Kong Stock Exchange and the Hong Kong Futures Exchange to form the Hong Kong Exchanges and Clearing Limited (HKEx); the launch of the second board (Growth Enterprise Market); and the demutualisation of the HKEx. The Exchange generally responded positively to these reforms and developments. As a result, the Hong Kong stock market experienced significant growth in terms of its market capitalisation ratio, turnover ratio, and the total value traded ratio. Despite the impressive growth in various stock market indicators, however, the Hong Kong stock market still faces some challenges, including regulatory challenges, as well as some concern over its future viability as a global equity hub.