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Rupiah heads for biggest weekly fall since May on higher US yields, firm dollar

By Thomson Reuters Sep 25, 2026 | 1:00 AM

By Shruti Agarwal

Sept 25 (Reuters) – Indonesia’s rupiah was headed on Friday for its biggest weekly decline since May, pressured by rising US Treasury yields, a stronger dollar and expectations that the Fed will keep rates higher for longer, while other regional currencies traded mixed.

The ​rupiah extended losses, weakening as much as 0.3% to 17,935 per dollar, putting it ‌on course for its worst weekly performance since mid-May, having depreciated more than 1% so far.

Bank Indonesia on Wednesday kept its benchmark interest rate unchanged at 5.75%, after raising it by a cumulative 100 basis points between May and June to support the weakening rupiah.

It signalled it would rather support the rupiah through market-based measures as elevated oil ‌prices ​and higher US yields pressure the currency.

Lloyd Chan, FX strategist at ⁠MUFG, said in a note that ⁠BI and the finance ministry were coordinating next year’s financing plans to help ease pressure on the domestic bond market, though such coordination would offer limited protection against a prolonged external shock.

Further deterioration in the external backdrop could leave more of the adjustment burden on the rupiah ​and increase pressure on the central bank to keep monetary policy tight, he said.

The rupiah has been the worst-performing currency among oil-importing emerging Asian economies this year, falling 7% against the dollar, ⁠as fuel subsidies aimed at shielding consumers from soaring ⁠crude prices have intensified concerns over the fiscal health of the $1.4 trillion economy.

Other ​Asian currencies were largely mixed on Friday, with the broader tone remaining cautious as 30-year US bond ​yields hit their highest since 2004 and a stronger dollar continued to weigh on ‌regional foreign exchange markets. [US/]

The Thai baht weakened further to 33.455, while the Indian rupee edged higher on expectations of intervention by the Reserve Bank of India.

The Malaysian ringgit strengthened 0.2%, while the South Korean won and Taiwan’s dollar gained 0.5% and 0.2%, respectively, though trading volumes were thin, with both markets ⁠on a holiday.

Regional equity markets ticked higher, with China, South Korea and Taiwan closed for holidays.

Stocks in Thailand and the Philippines rebounded from the previous session’s losses, rising 0.5% and 0.7%, respectively, while equities ⁠in Jakarta fell 0.6%.

South Korea’s KOSPI ‌climbed 2.7% this week, while Taiwanese stocks rose 1.8% in their ⁠second straight weekly gain on renewed optimism about chip demand.

Investors monitored a ​summit between ‌US President Donald Trump and Chinese President Xi Jinping in Washington amid ​no signs ⁠of breakthroughs on thorny issues such as AI, trade and Taiwan.

HIGHLIGHTS:

** Indonesia government commits to cooperative loan repayments as deadline looms

** Thai August exports rise 24.3% on-year, close to forecast

** Thailand’s SET, NYSE strike deal to explore dual listings and new products

** Japan says Trump voiced concern over weak yen in summit with PM Takaichi

Asia stock indexes and currencies at 0515 GMT

COUNTRY FX RIC FX DAILY FX YTD % INDEX STOCKS STOCKS

% DAILY YTD %

%

Japan +0.45 -0.93 1.29 28.02

China – +4.10 – -2.03

India +0.06 -6.29 0.09 -11.66

Indonesi -0.22 -7.00 -0.55 -27.56

a

Malaysia +0.22 -0.47 -0.07 -0.53

Philippi +0.31 -5.93 0.61 -4.76

nes

S.Korea +0.42 +5.81 – 68.03

Singapor +0.01 +0.52 0.11 22.46

e

Taiwan – -1.08 – 65.81

Thailand -0.16 -6.04 0.49 27.85

(Reporting by Shruti Agarwal in Bengaluru; ​Editing by Subhranshu Sahu)