On October 30, 2026, the Bank of Japan held its policy rate at 1.25% in an 8 to 1 vote. It also said for the first time that underlying inflation has reached its 2% target, which opens the door to another hike in December. The rate is already the highest since 1995.
For investors in Asia, Bank of Japan decisions travel fast through currencies and stock prices. This guide explains how rate hikes move the yen and the Nikkei 225, what happened in the last big shock, and what to watch next. It pairs with our guides on how US interest rates affect Asian stock markets and how a strong US dollar affects Asian markets.
Where the Bank of Japan Stands Now
- Policy rate: 1.25% after a September hike from 1%, the highest level since 1995, according to The Japan Times.
- October 30 decision: board member Hajime Takata dissented and asked for a hike, according to Reuters.
- Inflation view: the bank raised its core inflation forecast for the coming fiscal year to 2.6% from 2.4%.
- December odds: a market briefing citing Bloomberg says more than 80% of economists expect a hike next.
- ETF sales: the bank will nearly triple the pace of its ETF sales from January, to about 860 billion yen a year.
How Rate Hikes Move the Yen
- Rate gap: higher Japanese rates narrow the gap with US rates, which tends to support the yen.
- Latest reaction: after the October 30 decision the dollar slipped to about 157.1 yen from 157.8 yen, according to Seoul Economic Daily.
- Feedback loop: if the yen weakens again, import costs rise and the bank may need to tighten faster.
- Guidance matters: markets often react more to the bank’s wording about future hikes than to the decision itself.
How Rate Hikes Affect the Nikkei 225
- Exporters: a stronger yen shrinks the yen value of overseas sales. Goldman Sachs commentary notes that this typically weighs on the earnings outlook for Japan’s large exporters.
- Banks: higher rates tend to widen lending margins, which can help bank earnings.
- Rate sensitive stocks: higher yields lower the value of companies whose profits are expected far in the future.
- Mixed outcome: the Nikkei’s direction depends on whether yen strength or confidence in growth wins out.
A Real Example: August 2024
- The trigger: the bank raised its rate from 0.10% to 0.25% on July 31, 2024 and signalled more hikes.
- The fall: on August 5 the Nikkei closed down 12.4%, its worst day since the 14.9% drop of October 1987, according to Business Insider.
- The yen: the dollar fell from above 161 yen in July to about 142 yen in early August, as yen funded trades were unwound.
- The rebound: the Nikkei jumped 10.2% the next day, its biggest one day gain since 1990, according to Asia Fund Managers.
- The lesson: surprise and speed made the damage. Today’s hikes are widely signalled, which lowers shock risk but does not remove it.
Why It Matters Beyond Japan
- Funding currency: Japan has long been a low rate source of borrowing, so hikes can force investors to unwind positions.
- Regional spillover: on August 5, 2024, South Korea’s Kospi fell 8.8% and Taiwan’s Taiex fell 8.4%.
- Link to the dollar: the yen moves with the US rate gap, so Fed decisions and Bank of Japan decisions affect each other’s impact.
What to Watch Next
- December meeting: whether Governor Kazuo Ueda gives a clearer picture of where rates will peak.
- Dollar and yen: the exchange rate near 157 yen per dollar.
- Japan inflation: consumer inflation topped 2% in September for the first time this year, according to The Japan Times.
- Exporter guidance: the yen rates large companies assume in their earnings forecasts.
- US rates: the Fed held at 3.75% to 4.00% on October 28, with a December hike priced in.
The Takeaway
Bank of Japan hikes lift the yen and bank profits but can weigh on exporters and rate sensitive stocks. The size of the effect depends on how surprising the move is. Track the yen, the December guidance and US rates together.
The Japan Times, Reuters, Seoul Economic Daily, Bloomberg, Business Insider, Asia Fund Managers, Goldman Sachs. This article is for education only and is not financial advice.