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The Stock Exchange of Thailand opened August 15 at 1,618.32, a recovery from the 1,609.06 close on August 14. That 9-point overnight rebound came against 81.76 billion baht in daily turnover — 12.35 billion shares changing hands. Volume at that level is not thin, and that matters for interpreting whether the recovery had real buying behind it or was just short-covering. The day’s range of 1,605.13 to 1,623.82 shows the index tested lower before buyers pushed it back, which is a mildly constructive signal.
What 81.76 Billion Baht in Turnover Means
Daily turnover on the SET varies considerably. Thin days see 40–50 billion baht; heavy sessions during major events can exceed 120 billion. At 81.76 billion, August 15 was a normal-to-active session. That is significant because it means the intraday low of 1,605 was tested on genuine volume and rejected — sellers who wanted out found buyers willing to absorb the pressure. A light-volume test of support can break easily on the next heavy session. A volume-supported test that holds is a different signal.
The Foreign Flow Context
Foreign investors have been consistent net sellers on the SET through much of 2026, with cumulative foreign outflows around 773 billion baht for the year. This structural headwind explains why the SET has underperformed. The index has been absorbing foreign selling while domestic institutions and retail investors provide the other side of the trade.
The relevant question now is whether foreign selling pressure has stabilized. The baht’s modest monthly strengthening of 1.29 percent and the SET’s recovery from early-August lows suggests acute pressure may be easing, though not reversing. A genuine reversal in foreign flows would require BoT rate action or a clear global risk-on shift — neither of which is imminent.
Sector Breakdown: What Is Holding Up
Within the SET’s mid-August picture, relative strength is concentrated in energy — partly supported by Brent crude above $86 per barrel, which benefits PTT and PTTEP — and financials, where KBank and SCB continue to generate stable dividend income. Property and construction remain weak, reflecting tight credit and slower real estate transaction volume.
The energy sector’s outperformance comes with an important caveat: high oil prices benefit Thai energy producers but hurt the economy as an import cost. Net, oil above $85 is a mixed signal for the SET — it lifts the energy names with significant index weight but drags on consumer and industrial sectors.
What This Means for Thai Equity Investors
For Thai investors managing SET-exposed portfolios, the current level of 1,618 sits below the year’s high around 1,652 (late July) and above the early-August low near 1,605. The index is in the middle of its August range — not a clear buy or sell signal on its own.
The volume-supported bounce from 1,605 to 1,618 is genuinely useful information. If you have been waiting to add to SET-tracking funds — ESGx products, RMF equities, or SET50 ETFs — the technical picture suggests 1,600–1,610 is a better entry zone than chasing above 1,620. Let the market come to you if you are a long-term buyer. For active traders, the 1,605 intraday low serves as the key short-term support reference. A close below 1,600 on heavy volume changes the setup materially.
Key Levels
- Support: 1,605 (August 15 intraday low), 1,600 (psychological)
- Resistance: 1,625 (August 15 high), 1,652 (late-July peak)
- Watch: BoT August 26 statement; daily foreign investor flow data
The SET at 1,618 is showing stabilization signs after a difficult August. Stabilization and recovery are not the same thing. Volume-supported support levels are worth noting. What happens above is a separate question entirely.
