Asian FX Slides After June 18 FOMC as THB, KRW, PHP Lead Losses

Q: What unexpected shock could finally break the US dollar's strength and revive struggling Asian currencies?

The most plausible shock would be a sudden collapse in the “higher-for-longer” US rate story — either because US labor and inflation data weaken sharply or because a deeper-than-expected US downturn forces the Federal Reserve into faster rate cuts. That would hit Treasury yields, narrow rate differentials, and remove the main support now lifting the dollar and pressuring Asian currencies. A second, more disruptive possibility is a genuine US fiscal-confidence shock. If investors began to doubt the credibility of US public finances or the reliability of Treasuries as the world’s unquestioned safe asset, the dollar could lose part of its haven premium. That is a low-probability event, but it is one of the few shocks large enough to break the dollar’s current resilience. A third route would come from Asia rather than the US: a clear upside surprise in China’s economy or a broader regional growth rebound, especially in manufacturing and technology. Stronger Chinese PMI and demand data could revive cyclical currencies such as the Korean won and Thai baht by improving export and risk sentiment. For the won in particular, a renewed semiconductor rally would matter. For now, none of these shocks is the base case. The immediate backdrop still favors the dollar: elevated US yields, firm inflation, and steady labor data. But if markets get a decisive downside surprise in US macro data, that is the cleanest catalyst for a dollar reversal and a rebound in battered Asian FX.

3 articles · Updated · mufgresearch.com · Jun 26

THB, KRW and PHP ranked among Asia’s weakest currencies this week as most regional FX depreciated against the dollar after the June 18 FOMC meeting.
Elevated US yields and a firmer dollar drove outflows from higher-beta currencies, worsening negative carry and keeping pressure on regional exchange rates.
KRW led declines as weak semiconductor equities and risk-sensitive positioning amplified losses, while THB softened on cyclical exposure and tourism inflows that still failed to offset external headwinds.
PHP also underperformed because its reliance on external funding left it exposed to a higher-for-longer US yield backdrop, even as lower oil prices offered some support.
Next week’s data-heavy calendar shifts focus to US labor and regional inflation and activity releases; firm US data or weak China signals could extend pressure on Asian FX.