USD/JPY tops 160 as Fed-BoJ hikes keep rate gap at 250bp

Tokyo inflation hit the Bank of Japan's 2 percent target and USD/JPY still crossed 160 — the yen's problem is the Federal Reserve, not Japan's data.

USD/JPY crossed 160.00 for the first time since July 31, a fifth straight session of yen weakness, even as Tokyo core inflation reached 2 percent and unemployment fell to 2.4 percent. The pair added roughly 50 pips inside twenty minutes during Thursday's 14:00 GMT block as year-ahead consumer inflation expectations fell to 4 percent against a 4.3 percent consensus — a print the tape ignored entirely.

"The committee still has work ahead of it," Fed Chair Kevin Warsh said in his first Jackson Hole keynote, warning that officials lack confidence that underlying inflation is returning to 2 percent. Futures moved on it — a quarter-point increase on September 16 now prices above 55 percent, the first outright majority of the cycle, with at least one increase near 85 percent by October 28 and a second running close to 38 percent by December 9.

Tokyo CPI excluding food and energy reached 2 percent in August from 1.8 percent, while the headline rate rose to 1.9 percent. The measure policy actually follows — Tokyo prices excluding fresh food — rose 1.8 percent against a 1.7 percent consensus and a 1.7 percent prior, a third consecutive month of acceleration. Government electricity and gas subsidies, reinstated as the Gulf supply disruption pushed fuel costs higher, will suppress the headline rate through the October data, which makes the 2 percent reading on the ex-energy measure the honest one. Unemployment at 2.4 percent is the lowest in a year.

Five-year Japanese government bond yields printed a record high on speculation the BoJ will raise rates on September 18, and the June move took the policy rate to a 31-year high. Wire reporting through the month has the policy board weighing an increase and considering a faster pace than the roughly twice-yearly cadence it has kept since 2024, when it began unwinding a decade of stimulus. None of it bought the currency a single session.

The arithmetic is the problem. A BoJ move to 1.25 percent against a Fed range of 3.75 to 4.00 percent leaves the same gap of roughly 250 basis points that exists today. Two central banks tightening on consecutive days changes the level of rates in both countries and changes nothing about the reason to borrow one currency and hold the other. The only outcome that pays the yen is a Japanese increase against an American hold, and futures put that hold at 44 percent on its own. Every other branch either widens the gap or leaves it where it is — a poor return profile for anyone selling the carry trade on the strength of Japanese data.

The defense has a bond problem

Behind the price sits the July 31 operation — a joint Japanese and American yen purchase and the first coordinated intervention between the two since 2011. Tokyo has said it will not hesitate to repeat it. The scale was the largest single session on record at 8.45 trillion yen, with roughly 5.3 trillion more following in coordination, and it dragged the pair from just short of 164.00 into the 155.00 area.

Washington's interest in that operation is not friendship. A solo Japanese defense is funded by selling American government bonds, and June holdings data already showed Japan cutting $26.4 billion of Treasuries while the currency was being defended, inside a total foreign reduction of $72.1 billion. With thirty-year yields near their highest since 2007, the cheapest way to stop Tokyo selling duration is to lend it dollars instead. The yen defense and the long-end problem are the same trade.

What resolves it

The symposium runs through August 29 and Bank of Japan officials speak into the run-up to their decision, including a briefing after a Group of Twenty meeting in the United States next week. American payrolls land September 4, and the two policy decisions arrive two days apart in the middle of the month. Until then the yen is a bet on the Federal Reserve stopping, not on Tokyo delivering.

On the charts, resistance sits at the 160.00 handle and the 50-day exponential moving average on the same line, with 161.00 the first shelf above and the 162.00 to 163.00 zone that drew the July operation beyond it. Support lies just under 159.50, with 158.50 the base of last week's range and the 200-day EMA near 158.00 marking the floor the August recovery was built on. The bias is bullish while 159.50 holds, with the daily stochastic RSI near 74 climbing through the upper band. A daily close above 160.00 opens 161.00; invalidation comes on a daily close beneath 158.50.

This article is for informational purposes only and does not constitute investment advice.