The rank of the first seven nationalities remained unchanged from the previous year: the UK, Singapore, Hong Kong, Switzerland, the US, Japan and Mauritius.

Currently, the exchange has no foreign listing but ones can invest overseas by buying DR (depository receipt) which has been launched since 2018 as well as ETF.

To attract foreign investors and encourage cross-investment within ASEAN, exchanges in the region co-operate to facilitate investing in Indonesia, Malaysia, the Philippines, Singapore, Thailand and Vietnam.

It finally ceased operations in the early 1970s due to a lack of government support and limited interest and understanding of the equity market among populace.

Then in May 1974, long-awaited legislation for the incorporation of SET was enacted to provide securities trading in order to promote savings and mobilize domestic capital.

This was followed by revisions to the Revenue Code at the end of the year, allowing the investment of savings in the capital market.

By 1975, the basic legislative framework was in place and on 30 April 1975, the Securities Exchange of Thailand officially started trading.

[9][10] In 2008, the Securities and Exchange Commission, Thailand together with the central bank allowed domestic individual investors to invest abroad directly for the first time through a Thai brokerage.

The system allows brokers to advertise their buy or sell interests by announcing bid or offer prices.

[12] Trading through mobile device began in 2010 with the launch of settrade streaming for iPhone according to SET's 2010 annual report (page 36).

Since 2013, the Thai economy's slow growth due to factors such as an aging population and technological disruptions has adversely affected the benchmark SET index's performance.

This sideways market, characterized by near-zero growth over 12 years, underscores a range-bound performance that could be described as a 'lost decade' for investors, tying up capital in what proved to be dead money during this time.