Thai Stock Market: A Guide for International Investors

Thailand is the second-largest stock market in Southeast Asia, and one of the least covered in English. If you have looked at it at all, you have probably seen a headline P/E, a chart of the SET Index, and very little else. This page is the version I wanted when I first started pulling the numbers: what is actually listed, how it is priced against the US market, how a foreign investor gets shares in practice, and where the traps are.

Every figure below comes from our own screening database, recalculated daily across all 866 Thai common stocks. Where a number describes market structure or tax rather than market data, the source is linked.

The market in one paragraph

Thailand has two boards. SET is the main board with 629 listed common stocks; mai (Market for Alternative Investment) is the growth board with 237. Together they carry a combined market capitalisation of about ฿20.6 trillion. That is roughly the size of a single large US technology company — which is the first thing worth internalising. This is a market where a mid-cap position is meaningful and where liquidity, not valuation, is usually the binding constraint.

How Thai stocks are priced against US stocks

The comparison most people reach for is the index P/E. It is not very useful, because both indices are dominated by a handful of names. Median values across every listed common stock tell a cleaner story:

Loss-makers and companies with no meaningful figure are excluded from each median, which is why the sample size differs by row — quoting a single "market average" that silently includes 2,445 US stocks with no P/E at all is how most comparisons go wrong.

Read across the table and the shape is clear. Thai companies are cheaper on earnings, much cheaper on assets, and pay roughly twice as much income — while earning a return on equity that is, in the middle of the distribution, no worse than their American counterparts. That combination is the reason the market is interesting. It is also the reason to be careful: a market that has been cheap for a long time is usually cheap for a reason, and we cover that reason in detail in Thai Stocks Trade Below Book Value — Here's Why.

Income is the structural difference

The dividend gap is not a rounding difference, it is a different market culture:

Nearly half of the Thai market yields above 3%, against one in eight in the US. If you are building an income sleeve, that is a genuinely different opportunity set — with a genuinely different failure mode, which is that a high yield in Thailand is frequently a falling share price rather than a rising payout. Thai Dividend Stocks: 49% Yield Above 3%, vs 13% in the US works through how to separate the two.

Concentration: one company is a sixth of the market

The largest listed company accounts for 16.8% of total Thai market capitalisation on its own, and the top ten together account for 50.5%. Any index exposure you buy is, to a first approximation, a bet on ten companies. The ten largest by market capitalisation:

What the market is made of

By aggregate market capitalisation, the Thai market leans industrial, financial and energy — with very little of the software and biotech weighting that dominates US indices:

If you are coming from a US portfolio, Thailand is not a diversifier into "more of the same at a discount". It is a different sector mix, and that is most of the reason the correlation is imperfect.

How a foreign investor actually holds Thai shares

This is the part that trips people up, because a Thai listed share is not one instrument. Companies impose foreign ownership limits, and the exchange runs parallel boards to handle them:

• Foreign board (F shares) — shares registered to foreign holders. You get full economic rights and voting rights, but only while the company's foreign room is available. Foreign shares often trade at a premium to local shares precisely because that room is scarce.
• Local board (L shares) — the main liquidity pool. A foreigner can buy and sell these for price exposure, but if you hold local shares on the book-closing date you are not entitled to the dividend or to vote.
• NVDR (Non-Voting Depository Receipts) — introduced by the exchange in 2000 specifically to solve this. An NVDR trades on the local board at the same price and through the same order book as the ordinary share, and passes through all financial benefits including dividends. What it does not carry is a vote.

For most foreign investors buying for return rather than influence, the NVDR is the default instrument, and it is what your broker will normally route you into. If governance participation matters to your mandate, you need F shares and you need to watch foreign room. Thanathip & Partners and Clearstream's Thailand market profile both set the mechanics out in more detail than is sensible to reproduce here.

Tax, briefly

Two figures matter to a non-resident holder. Dividends from Thai listed companies carry a 10% withholding tax for foreign investors. Capital gains on shares sold through the exchange are generally exempt for foreign individuals who do not carry on business in Thailand — though the treatment differs for corporate holders, for off-exchange sales, and where no double taxation agreement is in place. Your own jurisdiction's treatment of the foreign income is a separate question again. See the exchange's own tax page and confirm your position with an adviser before sizing anything on it; this page is not tax advice.

Where to go next

• Browse every Thai listed stock — all 1,285 securities on SET and mai, with a page per company.
• The SET Index Explained — structure, concentration and sector mix in more depth.
• Thai Dividend Stocks vs the US — where the income comes from and how to avoid the traps.
• Why Thai Stocks Trade Below Book Value — the ten-year return record behind the discount.
• Quality screener — filter the whole market on fundamentals rather than starting from a list someone else picked.

Frequently asked questions

Can foreigners buy Thai stocks directly?
Yes. Foreign investors can trade on the local board, the foreign board, or through NVDRs. The practical difference is not access, it is which rights come attached — local shares give price exposure without dividends or votes on the book-closing date, NVDRs give the dividend without the vote, and foreign shares give both while foreign room lasts.

How many Thai stocks are there?
866 common stocks — 629 on SET and 237 on mai. Counting every listed security including warrants, ETFs, preferred shares and depository receipts brings the total to 1,285.

Are Thai stocks cheaper than US stocks?
On the two most common measures, yes. The median Thai listed company trades at 12.39 times earnings and 0.80 times book value, against 18.16 and 1.58 in the United States. Whether that is cheap or correctly priced is a different question — the ten-year return record is the argument for the second interpretation.

What is the dividend yield of the Thai market?
Among companies that pay anything, the median yield is 4.71%, against 2.62% in the US. 49% of Thai listed common stocks yield 3% or more, against 13% of US listed common stocks.

Educational information only, not personalised investment advice and not tax advice. Figures are generated automatically from our screening database, are recalculated daily and will differ from the values quoted here as the data moves. Market structure and tax statements are sourced as linked above and can change. Past performance is not indicative of future results.