The Singapore Exchange (SGX) and Bursa Malaysia will once again be reconnected from September 18, allowing easy trading access to investors from both sides of the Causeway.
Thailand will join the system later.
http://www.channelnewsasia.com/stories/singaporebusinessnews/view/1223777/1/.html
I joined a stockbroking firm in S’pore in 1987. Then M’sian and S’porean shares were jointly listed. Then the two exchanges split and there was CLOB. Then in 1998, CLOB was closed.