With mainland and Hong Kong markets out today, trading linked are also closed. ,
What are these 'trading links'?
Shanghai-Hong Kong Stock Connect is one:
- a mutual market access program through which investors in each market can trade shares on the other market directly
 - launched in 2014
 - Northbound Trading allows international and Hong Kong investors to trade eligible shares listed on the Shanghai Stock Exchange via the Hong Kong Stock Exchange.
 - Southbound Trading allows mainland Chinese investors to trade eligible shares listed on the Hong Kong Stock Exchange via the Shanghai Stock Exchange.
 - The Shanghai-Hong Kong Stock Connect allows foreign investors to access China's A-shares market (shares in mainland China-based companies that were previously difficult for foreign investors to access) and it allows mainland Chinese investors to access the Hong Kong market.
 
In addition to the Shanghai-Hong Kong Stock Connect, there is also the Shenzhen-Hong Kong Stock Connect
- launched in 2016
 - links Shenzhen Stock Exchange with the Hong Kong Stock Exchange in a similar way