By 1972, Hong Kong had four stock exchanges in operation. There were subsequent calls for the formation of a unified stock exchange. The Stock Exchange of Hong Kong Limited was incorporated in 1980 and trading on the exchange finally commenced on 2 April 1986. Since 1986, a number of major developments have taken place. The 1987 market crash revealed flaws in the market and led to calls for a complete reform of the Hong Kong securities industry. This led to significant regulatory changes and infrastructural developments. As a result, the Securities and Futures Commission (SFC) was set up in 1989 as the single statutory securities market regulator.