Hong Kong Exchanges and Clearing Limited (HKEx; Chinese: ????????????, also ????? or ??? ) operates a stock market and futures market in Hong Kong through its wholly owned subsidiaries The Stock Exchange of Hong Kong Limited (SEHK) and Hong Kong Futures Exchange Limited (HKFE). The Group also operates four clearing houses in Hong Kong: Hong Kong Securities Clearing Company Limited (HKSCC), HKFE Clearing Corporation Limited (HKCC), the SEHK Options Clearing House Limited (SEOCH) and OTC Clearing Hong Kong Limited (OTC Clear). HKSCC, HKCC and SEOCH provide integrated clearing, settlement, depository and nominee activities to their participants, while OTC Clear provides OTC interest rate derivatives and non-deliverable forwards clearing and settlement services to its members. HKEx provides market data through its data dissemination entity, HKEx Information Services Limited. HKEx also owns the London Metal Exchange, which has a dominant global position in base metals trading. With a total market capitalisation of over US$3.9 trillion as of 10 April 2015, one of the largest exchanges in the world by market capitalisation of listed companies (see List of stock exchanges for complete rankings). As of the end of March 2015, there were 1,775 companies listed on HKExs securities market.