Yen spikes to 10-week high and sparks intervention chatter

Published Thu, May 7, 2026 · 09:57 AM

[TOKYO] Sharp moves in the Japanese yen that sent the currency to a 10-week high renewed speculation that the country is intervening in the market.

The yen surged about 1.8 per cent in the span of 30 minutes during the afternoon of the Asia session and topped 155.04 per US dollar. The currency later pared some of the advance, and was wrapping the session late afternoon in New York at around 156.40.

The yen strengthened to around 123.30 per Singdollar on Thursday, after having weakened to a record low of 125.33 in April.

Japan’s markets were shut for a holiday on Wednesday (May 6), but analysts said the currency’s jump was not due to thin liquidity. The Ministry of Finance, or MOF, did not immediately respond to a request for comment outside regular working hours.

“The quick-fire move may partly reflect intervention as Japanese officials likely leaned into broad US dollar weakness,” said Elias Haddad, global head of markets strategy at Brown Brothers Harriman.

Talk about Japan’s market action has dominated trader discussions in recent days, with many seeing the 160 level as a trigger point for currency officials. In late April, the government intervened for the first time since 2024, causing the yen to surge as much as 3 per cent in intraday trading.

While Japanese officials have declined to comment directly on whether authorities stepped in, people familiar with the matter have said it took place on Apr 30 and analysis of Bank of Japan accounts indicates that it likely spent around US$34.5 billion.

In the US, the government is fully aware of Japan’s actions in the currency market, according to someone familiar with the matter.

Japan has the firepower to intervene 30 times in currency markets at last week’s scale, though officials are expected to conserve their reserves and step in at more effective moments, analysts at Goldman Sachs Group said.

The US dollar-yen pair “had been trading much closer to cyclical fundamentals recently than it had been in the lead-up to the last rounds of intervention in 2024, and an extension of these fundamental trends should continue to apply downward pressure on the yen in the weeks ahead”, a Goldman team including Stuart Jenkins and Teresa Alves wrote on Wednesday.

Japanese authorities spent a total of around US$100 billion in buying the yen several times in 2024 after the currency tumbled to around 160.17. Additional steps were taken on days when the yen reached 157.99, 161.76 and 159.45.

Options pricing suggests traders expect further bouts of action. One-week risk reversals, which depict the difference in demand between bullish and bearish bets, show yen sentiment is near the most bullish since January, hovering near levels that have previously been associated with currency intervention risk since 2022.

“Yen intervention may not stop the currency from weakening, but it has achieved one thing. Traders are much less concerned about yen tail risk because they’re confident that authorities will keep intervening to prevent a rapid depreciation,” Sebastian Boyd, macro strategist said. ”That’s made hedging out beyond the immediate short-term much cheaper.”

There has been speculative trading in currency markets for a while, Japanese Finance Minister Satsuki Katayama said on Monday. Last week, the nation’s top currency official, Atsushi Mimura, told speculators he was delivering a “final advisory if you want to escape” and echoed comments from Katayama that “the timing for taking bold steps is nearing.”

“The language used by the MOF last week in warning speculators about intervention risks was hard-hitting,” said Jane Foley, a strategist at Rabobank. “The fact that the US dollar was on the back foot due to hopes regarding the Iran war may have provided the incentive for the MOF to step in again.”

A Finance Ministry official had said that based on International Monetary Fund guidelines, Japan can conduct only two more sessions of three-day interventions by November if it wants to maintain its status of having a freely floating exchange rate.

Reports of the IMF guideline “emboldened investors to push USD/JPY back higher,” said David Forrester, a senior strategist at Credit Agricole CIB in Singapore. “This has given the MOF and the Bank of Japan another opportunity to intervene to defend around 157 in USD/JPY, which continues to look like the new line in the sand.” BLOOMBERG