The Stock Exchange of Singapore (SES) was a stock exchange company in Singapore. It was formed in 1973, when the termination of currency interchangeability between Malaysia and Singapore, caused the Stock Exchange of Malaysia and Singapore (SEMS) to separate into the SES and Kuala Lumpur Stock Exchange Bhd (KLSEB). It merged with the Singapore International Monetary Exchange (SIMEX) and the (SCCS) on 1 December 1999 to form the Singapore Exchange (SGX).