Asia FX: yen intervention in focus as rate hike bets put dollar near 19-mth high

Asian currencies experienced a flat-to-low range on Friday, with the Japanese yen nearing levels that previously triggered significant intervention from Tokyo. The regional currencies struggled against a strong dollar, which approached a 19-month high due to increasing confidence in a December Fed rate hike. Markets cooled before a slew of key data from China and Japan arrives next week.

The Chinese yuan (USDCNY) hovered near recent four-year highs but showed minimal movement on Friday. The Japanese yen (USD/JPY) rose 0.08% to 159.96 following a brief crossing of 160 yen the previous night, prompting warnings from Japanese officials about potential further intervention. The yen's last breach above 160 in early September prompted a joint intervention by Tokyo and Washington.

Japanese currency diplomat Atsushi Mimura cautioned that it was "too early to forget" September's intervention. The yen's weakness is primarily due to growing expectations of a persistent gap between Japanese and U.S. interest rates, even as the Bank of Japan prepares to raise rates. Japanese GDP data for Q3 and October's consumer price index are crucial for the BOJ's rate decisions.

The dollar index and futures steadied in Asian trading but were near their highest since early 2025 as investors bet on a December Fed hike. The greenback gained 0.8% this week, its third consecutive weekly increase. Strong U.S. consumer inflation data for October bolstered the case for a 25 basis point rate hike from the Fed, with some traders pricing a possible 50 basis point hike.

October's producer price index inflation will provide more evidence of sticky inflation, supporting the Fed's rate hike narrative. Fed policymakers' remarks and the upcoming PPI data could further pressure high-yielding Asian currencies, widening the yield gap between the dollar and regional currencies. The Australian dollar (AUD/USD) dipped slightly and approached its weakest levels of 2026, the Singapore dollar (USD/SGD) was nearly its highest in months, the South Korean won (USD/KRW) fell 0.3%, while the Indian rupee (USD/INR) rose 0.1% but remained below recent record highs due to falling oil prices.