Key takeaways
- The yen strengthened by more than ¥1 to the upper ¥156 range against the U.S. dollar after the Bank of Japan contacted currency dealers.
- A rate check can precede direct market intervention, although there was no confirmation that Japanese authorities purchased yen.
- The move followed a widely expected interest-rate increase that initially weakened the currency because investors questioned how quickly further hikes would follow.
The Japanese yen rallied sharply late Friday after the Bank of Japan conducted a rate check, increasing speculation that authorities may intervene to prevent further currency weakness.
The yen strengthened by more than ¥1 against the U.S. dollar, temporarily trading in the upper ¥156 range during early Saturday trading in Japan.
The move followed reports that the central bank contacted market participants to request current exchange-rate quotations. Such inquiries are closely watched because they can serve as a warning to traders before authorities enter the market to purchase yen and sell dollars.
No direct currency intervention had been confirmed.
Rate check follows an initially disappointing hike
The sudden recovery came after a volatile session in which the yen initially weakened despite the Bank of Japan raising its benchmark rate by 25 basis points to 1.25 per cent.
That is Japan’s highest policy rate in 31 years and represents another step away from the ultra-low and negative interest rates that defined the country’s monetary policy for decades.
The increase was approved by seven of the central bank’s nine board members. Two policymakers opposed the decision amid concerns about economic growth and the strength of domestic inflation.
Investors had already largely anticipated the hike. The yen therefore received little support from the decision itself and fell as much as 1.2 per cent against the dollar, approaching ¥158.
Markets were also disappointed that Governor Kazuo Ueda did not establish a timetable for additional increases. His data-dependent guidance created uncertainty over whether the central bank would continue tightening rapidly enough to reduce the large interest-rate gap between Japan and the United States.
What a rate check means
During a rate check, a central bank contacts currency dealers to ask what prices would be available for buying or selling a currency.
The inquiry does not itself involve a transaction. However, it allows officials to assess liquidity and signals that they are paying close attention to current exchange-rate movements.
Japan’s Ministry of Finance is responsible for deciding whether to intervene in foreign-exchange markets, while the Bank of Japan typically carries out the transactions.
That makes Friday’s rate check a warning rather than proof that intervention is imminent. Its immediate impact came from encouraging traders to reduce bets against the yen before officials potentially entered the market.
Actual intervention would involve Japan selling dollars from its foreign-exchange reserves and purchasing yen. Such action can create a rapid currency move, particularly when speculative positioning is heavily tilted toward further yen weakness.
Its longer-term effectiveness is less certain. Previous interventions have produced substantial short-term rallies without permanently overcoming the interest-rate forces weighing on the currency.
Interest-rate gap continues supporting the dollar
Japan’s 1.25 per cent policy rate remains well below the Federal Reserve’s target range of 3.75 to 4 per cent.
The Federal Reserve raised rates this week and indicated that further tightening may be necessary to control inflation. Higher U.S. Treasury yields make dollar-denominated assets more attractive relative to Japanese investments.
That difference supports the yen carry trade, in which investors borrow cheaply in yen and invest the proceeds in higher-yielding assets elsewhere.
The strategy can remain profitable while the yen is stable or depreciating. A sudden appreciation creates the opposite effect because investors must repurchase yen at a higher price to repay their borrowing.
A disorderly unwinding of carry trades can therefore affect markets well beyond Japan, potentially producing selling across equities, bonds and other leveraged investments.
Why investors should care
The rate check demonstrates that Japanese officials are uncomfortable with the currency weakening toward ¥158 even after the latest interest-rate increase.
A stronger yen could reduce Japan’s import costs, particularly for oil and other commodities priced in dollars. That would help limit inflation and ease pressure on households.
However, appreciation can create challenges for Japanese exporters because overseas revenue becomes worth less when converted into yen. Currency swings can therefore influence earnings expectations and Japanese equity valuations even when companies’ underlying sales remain unchanged.
U.S. investors seeking direct yen exposure can monitor the Invesco CurrencyShares Japanese Yen Trust (NYSEARCA), which generally rises when the yen strengthens against the dollar.
The most important question is whether Friday’s move becomes sustained appreciation or fades once the immediate intervention concerns pass.
Investors should watch for additional rate checks, comments from Japan’s Ministry of Finance and evidence of unusual transactions in official financial data. The pace of future rate increases from both the Bank of Japan and Federal Reserve will ultimately determine whether the interest-rate gap begins to narrow.
For now, the late rally shows that even without confirmed intervention, Japanese authorities can still create significant volatility by signalling that they may be preparing to act.