The Stock Exchange of Hong Kong Limited (SEHK, also known as Hong Kong stock exchange) is a stock exchange based in Hong Kong. It is Asia's third-largest in terms of market capitalization behind the Tokyo Stock Exchange and Shanghai Stock Exchange, and the fourth single largest stock market in the world. As of 2018, it has 2,315 listed companies with a combined market capitalization of HK$29.9 trillion. It is reported as the fastest growing stock exchange in Asia. The stock exchange is owned by SEHK-listed company Hong Kong Exchanges and Clearing Limited (HKEX) through its subsidiary Stock Exchange of Hong Kong Limited. The physical trading floor at Exchange Square was closed in October 2017.