Yen gains as markets expect tighter BOJ policy

Highlights

The yen strengthened to around 157.5 per dollar.
Markets are close to fully pricing a BOJ hike this month.
Expectations are building for a faster pace of tightening.

The yen climbed as far as 157.545 per dollar in Asian trading, its strongest level in nearly a month, after gaining about 0.9% overnight. The currency also advanced against the euro and sterling, while traders moved close to fully pricing a BOJ rate increase this month, according to Reuters.

BOJ rhetoric changes the rate outlook

The shift followed comments from BOJ board member Hajime Takata, who argued that rate increases should be carried out flexibly as inflation pressures intensify rather than according to a predictable schedule.

Governor Kazuo Ueda also indicated that interest rates could be discussed at every upcoming meeting. Together, the remarks strengthened the possibility that tightening could proceed faster than investors had expected only weeks ago.

Swap markets now imply a meaningful chance of quarter-point increases at both the September and October meetings, while expectations for cumulative tightening through year-end have risen.

That repricing matters for the yen because Japan has spent years with borrowing costs far below those of other major economies. The wide interest-rate gap encouraged investors to borrow cheaply in yen and move capital into higher-yielding assets overseas. Faster BOJ tightening would reduce that disadvantage.

Intervention fears fade as bond market steadies

The speed of the yen move initially put traders on alert for another government intervention. Japan and the United States carried out a rare joint yen-buying operation on July 31, helping push the currency toward 155 per dollar before much of the gain faded.

This time, however, analysts saw less evidence that authorities had stepped into the market. The yen rally was broad-based and coincided with a clear change in rate expectations.

Japan also successfully sold 30-year government bonds at an average yield just above 4%, helping ease concerns after a sharp global bond selloff. Demand was slightly weaker than at the previous auction, but the sale suggested that large domestic institutions may still be willing to absorb long-dated debt at higher yields.

Japan becomes a bigger global market risk

The yen move comes as investors reassess Japan on several fronts. The 10-year government bond yield touched 3% earlier this week, its highest level since 1996, before easing slightly below that threshold.

Fiscal concerns remain important as Prime Minister Sanae Takaichi pursues ambitious spending plans. At the same time, speculation that Japan's giant GPIF pension fund could increase allocations to domestic assets has added another potential source of support for the yen and Japanese bonds.

The next major test may come from U.S. payroll data. Markets currently assign roughly a 61% probability to a Federal Reserve rate increase in September, meaning the yen outlook still depends heavily on the relative policy paths of the BOJ and Fed.

We also reported Japan bond yields climb to 30-year highs as rate expectations rise.

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