Asia's New Currency Playbook: Defending Currencies Without Draining Reserves

South Korea: Pension Fund as FX Shield

South Korea's National Pension Service (NPS), the world's third-largest pension fund, has been conducting strategic FX hedging — actively selling dollars in the onshore market to support the won . This provides dollar liquidity without depleting the Bank of Korea's reserves.

The NPS extended its FX swap line with the BOK (to $65 billion) and adopted a more flexible hedging approach, raising its strategic hedging ratio to 15% of overseas assets as a baseline plus a 5% tactical allowance . Separately, authorities encouraged corporate dollar repatriation .

Indonesia: Bond Incentives and Yield-Boosting Coordination

Bank Indonesia issues SRBI (Sekuritas Rupiah Bank Indonesia) — rupiah-denominated debt securities backed by government bonds held by the central bank . These offer attractive yields: 12-month SRBI rates hit 7.59–7.70% in mid-2026 to pull in foreign portfolio inflows . In June 2026, BI's governor and the finance minister jointly agreed to increase yields on Indonesian assets to attract capital after the rupiah hit record lows . BI also disbursed macroprudential liquidity incentives totaling Rp427.1 trillion as of early 2026 to support bank lending without monetary easing .

Taiwan: Letting Market Forces Work

Taiwan's central bank has allowed the currency to strengthen at times and leaned on exporter dollar sales to smooth the FX market, rather than intervening directly . The central bank dialed back some derivatives positions used to weaken the currency, effectively letting market forces play a larger role.

Japan: Unprecedented U.S.-Japan Coordination

Japan conducted a joint yen-buying intervention with the U.S. — an unprecedented step — to arrest excessive yen depreciation. This was the first time the two countries coordinated directly in the FX market, signaling a new level of bilateral cooperation on currency stability.

China: Overseas Borrowing and Reserve Placement

China allowed more overseas borrowing to improve capital flows, boosted FX reserves parked in Hong Kong, and used verbal warnings alongside daily USD/CNY fixing adjustments .

The Broader Backdrop: Traditional Tools Still in Play

All these creative measures operate alongside conventional levers:

• Rate hikes/holds: Indonesia held its BI-Rate at 5.75% in July 2026 after earlier cuts, maintaining a positive interest-rate differential . India and other central banks have similarly kept rates elevated.
• Direct spot intervention: Authorities in India, Indonesia, the Philippines, and Taiwan have all intervened directly in FX markets at various points, but the new tools are designed to reduce the frequency and scale of such reserve-draining operations .
• Reserve accumulation: Major Asian central banks added more than $400 billion to reserves in 2025 alone, building a war chest that now stands at nearly $8 trillion across the region .

The common thread is clear: rather than burning precious reserves through unilateral dollar sales, Asian central banks are using their large diaspora networks, state-controlled pension funds, and sovereign debt issuance to attract dollars and reduce net demand for dollars, all while keeping reserves intact for the geopolitical shocks and rate pressures that still lie ahead.