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Yen weak ahead of BOJ decision; rate hike expected - Finance news and analysis from Global Banking & Finance Review
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Yen weak ahead of BOJ decision; rate hike expected

Published by Global Banking & Finance Review

Posted on September 18, 2026

3 min read

· Last updated: September 18, 2026

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Yen Drops as Traders Brace for Bank of Japan Rate Hike and Market Reactions

By Gregor Stuart Hunter

Market Overview and Currency Movements

SINGAPORE, Sept 18 (Reuters) - The yen got off to a weak start against the dollar and the euro at the start of Asian trading on Friday, with currency markets in a subdued mood ahead of an expected rate hike from the Bank of Japan later in the trading session.

Yen Performance and Central Bank Expectations

The yen fell 0.1% to 156.19 yen per dollar, resuming its decline after snapping a three-day losing streak on Thursday as traders prepare for the Japanese central bank to lift interest rates to the highest level in more than three decades. Against the euro, the yen was 0.2% weaker at 179.3000 yen.

Inflation Data and Rate Hike Probabilities

The yen's softness followed data released Friday which showed Japanese inflation fell slightly short of expectations in August. Swaps pricing indicates that the market views a hike from the BOJ as 83% likely, with quarterly rate hikes expected to follow, according to data from LSEG.

Market Reactions and Forward Guidance

"Given the degree of pricing, the rate decision itself may have limited impact on the yen," said Chris Weston, head of research at Pepperstone Group in Melbourne. "Instead, attention should fall on the forward swaps curve and the bank’s guidance around the pace and urgency of further tightening."

"Governor Ueda’s press conference will therefore be key. The market will be looking for confirmation that further normalisation remains firmly on the table, while assessing whether the Bank sees any urgency to move again."

Other Major Currencies and Central Bank Actions

The British pound was flat at a 2-1/2-month low of $1.3359 after the Bank of England held interest rates on Thursday and unexpectedly paused sales of government bonds for six months. 

The euro was flat at $1.1478. The Aussie dollar was 0.1% firmer at $0.7117 as Reserve Bank of Australia Governor Michele Bullock warned lawmakers that risks to inflation flagged by policymakers appeared to be materialising; its kiwi counterpart was down 0.1% at $0.5724.

The US dollar index, which measures the greenback's strength against a basket of six currencies, was flat at 100.2100, after edging back from a 2-1/2-month high on Thursday.

Federal Reserve Outlook and Market Sentiment

Traders narrowly expect a hike from the Federal Reserve next month as investors say they are becoming more confident in Chair Kevin Warsh's efforts to reassert the central bank's independence from the White House. Fed funds futures are pricing an implied 53% probability of a quarter-point hike at the central bank's next two-day meeting next month, compared with a 27.2% chance a week ago, according to the CME Group's FedWatch tool.

Commodities and Cryptocurrency Market Updates

Oil prices started the day lower, with Brent crude futures off 1% at $103.76 per barrel as traders reassess supply risks after Saudi Arabia and Yemen's Iran-backed Houthis traded strikes on Thursday. China has asked Tehran to help rein in the Houthis after their military blitz over the past week, three Iranian sources familiar with the matter told Reuters.

In cryptocurrencies, bitcoin slid 0.1% to $76,442.97 while ether was down 0.2% at $2,447.39.

(Reporting by Gregor Stuart Hunter; Editing by Thomas Derpinghaus)

Key Takeaways

  • BOJ is expected to raise rates by 25 basis points to 1.25% at its Sept 18 meeting—a level not seen since 1995—supported by sustained inflation pressures around its 2% target. (marketscreener.com)
  • August core inflation rose 1.7% YoY, slightly below forecasts, but the BOJ's preferred index (excluding food and energy) advanced 1.9%, reinforcing the case for a near‑term hike. (hk.marketscreener.com)
  • Market pricing shows an 83% probability of a September BOJ rate hike with expectations for further quarterly moves; focus now shifts to guidance and Ueda’s press conference for rate path signals. (marketscreener.com)

References

Frequently Asked Questions

Why is the yen weak ahead of the BOJ decision?
The yen is weak as traders expect the Bank of Japan to raise interest rates to the highest level in over three decades and markets are anticipating further rate hikes.
How likely is a Bank of Japan rate hike?
Swaps pricing indicates an 83% likelihood of a Bank of Japan rate hike, with quarterly hikes expected to follow.
What impact will the BOJ rate decision have on the yen?
The rate decision itself may have limited impact since markets have largely priced it in; focus is on BOJ's forward guidance and urgency of further tightening.
How are other major currencies performing?
The British pound, euro, and US dollar index are largely flat, while the Aussie dollar is slightly up and the kiwi is slightly down.
What are the main market factors influencing forex rates now?
Key factors include anticipated rate moves by central banks, Japanese inflation data, global oil prices, and geopolitical developments.

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