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Thailand’s SET index closed at 1,612.62 on August 12, down 11.74 points or 0.72%, one session after gaining 12.36 points to close at 1,624.36 on August 11. More telling than the daily swings: foreign investors sold a net THB 7.73 billion in just the market’s first two trading days of August. At that pace, August could become a difficult month for the SET.
What Is Driving Foreign Selling
The outflow is not a Thailand-specific story. Emerging market equities broadly face pressure from the wide spread between US Treasuries (yielding ~3.5%) and Thai government bonds. Money gravitates toward the higher-yielding safe asset when the risk premium for holding emerging market equities doesn’t adequately compensate. With the BoT at 1%, that calculus is particularly unfavourable for foreign institutional investors.
The Hormuz situation compounds the picture. An energy price spike would hit Thailand’s current account harder than most regional peers — Thailand imports roughly 90% of its oil needs. Foreign investors price that vulnerability into Thai equity positions. Q2 earnings season is running concurrently; disappointments accelerate selling, positive surprises partially offset it.
Technical Picture: 1,600 Is the Line
Daol Securities puts SET resistance at 1,625 and support at 1,600. The index at 1,612 sits between those levels with a 0.75% buffer above the support — not comfortable. A close above 1,625 with foreign flows turning positive would suggest August weakness is over. A break below 1,600 on heavy volume typically triggers stop-loss selling that amplifies the downward move. The 1,600 level is a round-number support that both retail and institutional desks watch.
What This Means for Thai Retail Investors
Foreign selling creates opportunity and risk simultaneously. Indiscriminate selling pressure can push fundamentally strong companies to attractive valuations. But sustained foreign outflows can drag an index down for weeks regardless of underlying quality.
The key distinction is between export-facing and domestic-facing SET companies. Exporters — automotive parts, electronics, some food producers — are insulated or benefiting from baht weakness: their dollar revenues convert back to more baht. Domestic-focused businesses in retail, property, and utilities face tougher conditions: higher import costs, softer consumer sentiment, no currency tailwind.
A 1.5% to 2% reallocation within a Thai equity portfolio from domestic-facing toward export-oriented names is a reasonable defensive move that avoids trying to time the index as a whole.
What to Watch
Daily foreign net flow figures from the Stock Exchange of Thailand are published every trading day. A shift from net selling to net buying — even modest — signals the August pressure is easing. Watch Q2 earnings from major energy and property companies, which have been cited as key market drivers. The Thai Q2 GDP release from NESDC, expected in mid-August, will set the growth narrative for H2. And keep an eye on the 1,600 support — breaking it cleanly changes the technical conversation entirely.
What to watch: Daily SET foreign net flows, Q2 earnings from energy and property sectors, Q2 GDP release, and the 1,600 support level.
