Indonesia's rupiah fell to 18,010 per U.S. dollar, its weakest level since August 4, breaching 18,000 for the first time in nearly two months as Asian currencies faced pressure from rising global bond yields, U.S.-Iran tensions and higher oil prices. The 10-year U.S. Treasury yield rose above 5.27%, a 19-year high, while the dollar held near a two-month peak. Fakhrul Fulvian, chief economist at Trimegah Sekuritas Indonesia, said external pressures, particularly higher long-term yields, weighed on the rupiah. He also cited Bank Indonesia's aggressive bond-buying, saying that keeping yields below levels required by private investors can shift the adjustment into the currency. Jakarta's benchmark stock index fell as much as 2.2% after a new Indonesia Stock Exchange rule took effect, reducing the minimum share-trading price to 1 rupiah from 50. The change was intended to improve liquidity and price discovery after an MSCI downgrade warning in January over transparency and investability concerns. The benchmark has fallen more than 30% this year. Several Indonesian stocks dropped more than 14%, near the daily limit, including GoTo Gojek Tokopedia, which declined 14% in both sessions. The index later recovered some losses and was down 0.6% at 0745 GMT as Bank Rakyat Indonesia and Bank Mandiri rose more than 1%. Regional equities were broadly lower, while the Monetary Authority of Singapore said it would allocate $1.1 billion to asset managers to support equities. Related developments included Trump's denial that he offered Iran sanctions relief, Tehran's stated readiness for talks, Thailand's cabinet approval of $37.5 billion in borrowing for fiscal 2027, and Indonesia's parliament passing the 2027 state budget bill into law.