From USD/THB to the Bigger Picture
For most people, the baht means USD/THB. It is quoted daily, tracked by exporters, tourists, and investors around the world. Over the past decade it has fluctuated in a visible band between 30 and 37 per dollar — which looks relatively “stable” at first glance.
But the dollar is just one partner. Thailand trades as much with China, Japan, and ASEAN as with the US. Inflation differences also matter. That is why economists use the Real Effective Exchange Rate (REER) — a broader scoreboard of Thailand’s competitiveness.
REER: What the Data Shows
When we place REER next to USD/THB (2015–2025), the paradox is clear:
Before 2021: The baht’s REER was elevated compared to ASEAN peers like the rupiah and ringgit — a competitiveness drag.
After 2021: The baht slipped below regional peers, yet remained highly volatile, so exporters never gained a stable advantage.
Over the full decade, the baht has been ASEAN’s second most volatile currency, just behind Indonesia’s rupiah.
In other words, the baht is not simply “strong” or “weak” — it is unstable in both directions.
(Source: BIS data, GARYO FINANCE)
The Safe-Haven Paradox
Despite this instability, global investors treat the baht like a safe-haven asset:
It moves opposite the USD (–0.30 correlation), a hallmark of safe-haven flows.
It clusters with the Singapore dollar and Malaysian ringgit, despite far higher volatility.
Its 10-year peak-to-trough swing reached 15% — a burden exporters cannot ignore.
The paradox: the baht attracts capital like a safe-haven, yet it is among the least predictable ASEAN currencies for local businesses.
Why It Matters
Thailand has become ASEAN’s financial safe-haven. That prestige pulls in capital when global markets wobble. But the cost is weaker export competitiveness and slower growth dynamism.
This is Part 1 of our Financial Paradoxes series — setting up the puzzle.
Parts 2–3: How policy rates and bond yields reinforced the paradox.
Part 4: How terms of trade reveal the true cost.
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Dai Kadomae, CFA, CPA
GARYO FINANCE | LinkedIn