USD/THB to 34.00 by October 28: the BOT policy hold

USD/THB reaches 34.00 by October 28, 2026 in the base case, 34.100 in the bull case and 33.00 in the bear case, using MUFG's end-year forecast for the base and that bank's fourth-quarter point for the bull case. The path runs through a Bank of Thailand (BOT) hold at 1.00 per cent, and a weekly close below 33.587 breaks it.

The BOT reference rate for the US dollar was 33.6410 on October 8, 2026, the latest session on report FM_FX_001_S3, last updated at 18:00 that day. The gap from that print to the 34.00 base case is 0.3590. MUFG already carries 34.100 for the fourth quarter, from a September 30 spot close of 33.587. The rest is the rate gap, and why 31.0 is not the working case.

Key Levels:

• USD/THB: reference rate 33.6410 on October 8, 2026 — BOT report FM_FX_001_S3, updated 18:00 that day
• Base case target: 34.00 by October 28, 2026 — MUFG end-year forecast, Lloyd Chan, September 17, 2026
• Bull case target: 34.100 at the meeting — MUFG October 2026 outlook, Q4 2026 column
• Bear case target: 33.00 — top of the 32.0–33.0 ministry average cited by UOB on August 6, 2026
• Major support: 33.5960 — BOT reference rate on October 2, 2026, the low of the October 1–8 window
• Major resistance: 33.8131 — average commercial-bank selling rate on October 8, 2026
• Invalidation level: weekly close below 33.587 — MUFG spot close on September 30, 2026

How this USD/THB call was put together

The spot is the BOT reference rate on report FM_FX_001_S3, opened October 9, 2026 and last updated at 18:00 on October 8. October 9 was not on it. The linked interbank file prints the same 33.641.

Related:GBP/CAD to 1.8970 by November 5 on the July average

Meeting five on the meeting page falls on Wednesday, October 28, 2026. Notices: February 25, April 29, June 24, August 26. Levels: Chan and the October MUFG outlook. The 33.587 mark is a September 30 spot close, not the reference rate. Commerzbank's 33.62 market print is not the spot either. Figures below are taken from those pages.

What the October tape and the rate gap actually show

October 1 to October 8 was a 0.0020 drift inside a 0.0660 range, not a trend.

Source: Bank of Thailand, FM_FX_001_S3, opened October 9, 2026, last updated October 8, 2026 at 18:00. Unit: baht per one US dollar. Window: October 1–8, 2026.

The Bank of Thailand reference rate is the daily US dollar print on report FM_FX_001_S3, Rates of Exchange of Commercial Banks in Bangkok Metropolis. On the copy opened on October 9, 2026, the latest reference rate was 33.6410 for October 8, 2026, and the file was last updated at 18:00 that day. Across the six published sessions from October 1 to October 8 the reference rate sat between 33.5960 on October 2 and 33.6620 on October 7, a range of 0.0660. The same October 8 row shows a commercial-bank mid rate of 33.6521 and an average selling rate of 33.8131. Those three prints are the spot complex used here. The October 9 reference rate was not on the report. The base case of 34.00 sits 0.3590 above the October 8 reference rate, while the bull case of 34.100 sits 0.2869 above that day's average selling rate, so part of the offered-side gap is already inside the commercial-bank complex.

The Committee cut four to two on February 25, from 1.25 to 1.00 per cent, then held three times. The August 26 statement gave no exchange-rate number.

Why 34.00 by the October 28 decision is the base case

The 34.100 cell is the bull case because October 28 sits in that quarter. Commerzbank's October 7 note put the ten-year spread at 291 basis points. The method follows the USD/SEK rate-gap note and the US ten-year yield call, without using their targets.

"We remain cautious on THB and maintain our USDTHB forecast of 34.00 by end-year. While Thailand is benefiting from the technology cycle, stronger electronics exports are insufficient to offset deteriorating terms of trade, weak growth, low rates, persistent portfolio outflows, and rising fiscal constraints."

— Lloyd Chan, Senior Currency Analyst, Global Markets Research, MUFG (MUFG Research, September 17, 2026)

MUFG puts second-quarter growth at 1.9 per cent year on year. Commerzbank puts September prices at 2.8 per cent, against a 3.1 per cent consensus.

The base case is that USD/THB is at 34.00 on October 28, 2026, the day the Bank of Thailand announces Monetary Policy Committee decision five. That level is the end-year forecast Lloyd Chan published at MUFG on September 17, 2026. MUFG's October outlook then marked a spot close of 33.587 on September 30, 2026 and a fourth-quarter forecast of 34.100, with 34.000, 33.800 and 33.500 in the following three quarters. The policy rate is 1.00 per cent after a four-to-two cut on February 25, 2026 and unanimous holds on April 29, June 24 and August 26. Commerzbank, writing on October 7, 2026, put the ten-year US Treasury minus ten-year Thai government bond spread at 291 basis points, the widest in a year. A hold that leaves that gap intact is the mechanism that carries the reference rate from 33.6410 toward 34.00, with 34.100 the bull case if the whole fourth-quarter point arrives at the meeting.

A softer dollar puts 33.00 ahead of 34.00. The 0.3590 gap does not have to clear in 19 days.

Where the path to 34.100 can fail

There is no term here for intervention. The August minutes, published September 9, 2026, tie the year's depreciation to imported energy. The BOT can lean against a 0.3590 drift without moving 1.00 per cent. That channel is a hole.

UOB printed 31.4, 31.2 and 31.0 on February 19, 2026. The October 8 reference rate is 2.6410 above 31.0, so that path is a marker, not a 19-day destination.

"Looking ahead, broad USD softness should keep USD/THB biased lower."

— Enrico Tanuwidjaja and Sathit Talaengsatya, economists, United Overseas Bank (FXStreet, February 19, 2026)

On August 6, 2026 UOB reported a ministry assumption of USD/THB at 32.0–33.0. Until a newer file is opened, 33.00 is the bear case, not 31.0. A quarter point need not clear on the next policy date, the same limit as the USD/BRL and USD/INR notes.

What would invalidate this call

The base case to 34.00 breaks if any one of these four signals fires.

• A weekly close below 33.587. That September 30, 2026 spot close is 0.0540 under the October 8 reference rate. The call box carries the price only.
• The October 28 decision lifts the policy rate above 1.00 per cent. A hike removes the low-rate leg of the call.
• The ten-year spread narrows by 50 basis points or more from 291 basis points, the October 7, 2026 Commerzbank reading. This note has no other yield feed.
• The reference rate prints at or below 33.00. That is the top of the 32.0–33.0 band UOB cited on August 6, 2026.

What to watch into the October 28 announcement

Meeting five is announced on Wednesday, October 28, 2026, with minutes listed for Wednesday, November 11. Watch whether the vote is another hold at 1.00 per cent. The reference rate still has to clear the October 8 selling rate of 33.8131 before 34.00 is an official print. Clearing 33.8131 does not prove the call. A weekly close below 33.587 does end it. The November 11 minutes then show whether the hold language survived a 2.8 per cent September inflation print.

TL;DR

USD/THB reaches 34.00 by October 28, 2026 in the base case, 34.100 in the bull case and 33.00 in the bear case. The Bank of Thailand reference rate was 33.6410 on October 8, 2026, on report FM_FX_001_S3, last updated at 18:00 that day. MUFG's end-year forecast is 34.00 and its fourth-quarter forecast is 34.100, against a policy rate of 1.00 per cent held since the February cut. The call breaks on a weekly close below 33.587, MUFG's September 30 spot close, and also if the Committee lifts the policy rate or the reference rate prints at or below 33.00.

FAQ

What is the USD/THB base case into the October 28 decision?

USD/THB reaches 34.00 by October 28, 2026 in the base case. That date is meeting five on the Bank of Thailand calendar. The level is Lloyd Chan's September 17 end-year forecast at MUFG. The bull case is 34.100 and the bear case is 33.00. These figures are not dealing instructions.

Which spot rate is this USD/THB call using?

The spot is 33.6410, the October 8, 2026 reference rate on report FM_FX_001_S3, last updated at 18:00. That row also shows 33.4911 buying transfer, 33.8131 selling and a 33.6521 mid. MUFG's 33.587 close is a different series and is only the invalidation mark. October 9 was not on the report.

Why does a Bank of Thailand hold matter for USD/THB?

The policy rate is 1.00 per cent after the February 25, 2026 cut and three later holds. MUFG said on September 17 it was likely to stay into early 2027. A hold on October 28 leaves the 291 basis-point spread Commerzbank published on October 7 in place. A hike would remove it.

What level invalidates the USD/THB call?

The call is wrong on a weekly close below 33.587, MUFG's September 30, 2026 spot close, not the October 8 reference rate of 33.6410. That close means the drift toward 34.00 has reversed before the decision. A reference-rate print at or below 33.00 is a deeper failure, back inside the ministry band.

How does this differ from UOB's 31.0 fourth-quarter forecast?

Enrico Tanuwidjaja and Sathit Talaengsatya printed 31.4, 31.2 and 31.0 on February 19, 2026. The Bank of Thailand cut once, to 1.00 per cent, then held. The October 8 reference rate is 33.6410, not 31.0. A move to 33.00 would already break this call. The 31.0 path is only a marker.

This article is informational analysis only and is not financial, investment, or trading advice. Foreign-exchange, commodity, and equity markets are highly volatile and can lose substantial value rapidly. Leveraged products carry total-loss risk and may exceed the initial margin posted. Past performance and historical correlations do not guarantee future results. Do your own research and consult a regulated financial adviser before making any investment decision.