Yen surges 1.1% as US jobs slump revives intervention watch

The yen jumped as much as 1.1% against the dollar Friday after US payrolls unexpectedly fell by 23,000 in July, with traders on alert for another round of coordinated intervention just days after Washington and Tokyo jointly bought yen to halt the currency's slide.

"The scale of the undershoot on payrolls means it makes sense for the dollar to be falling — look at the short end of the US yield curve — so the currency moves look like they are fundamentally driven," Lee Hardman, senior currency analyst at MUFG, said.

The dollar fell to 156.68 yen, its lowest since early May, before recovering to 157.16. The Labor Department reported nonfarm payrolls decreased by 23,000 jobs last month, versus the 80,000 gain economists had forecast. June's reading was revised down to a 20,000 increase from a previously reported 57,000, while the unemployment rate eased to 4.1 percent. Two-year Treasury yields dropped sharply after the release, with rate futures cutting the probability of a September Fed hike.

The weak jobs report complicates the Federal Reserve's tightening path just as the Bank of Japan weighs further rate increases. The BOJ has raised borrowing costs to their highest in 31 years, and minutes from its June meeting showed board members discussing upside inflation risks. With nearly 95 percent of economists in a Reuters poll saying unilateral intervention alone cannot sustainably curb yen weakness, the market now watches whether the Fed's September meeting delivers a hike or a pause — and whether Tokyo and Washington step in again if the yen strengthens too fast.

Just after the payrolls release, Japanese Finance Minister Satsuki Katayama said Washington and Tokyo had been "closely communicating" and would not hesitate to intervene. The threat has loomed large since July 31, when the two governments conducted their first coordinated yen-buying operation in about 40 years, confirming a rare bilateral action to halt the yen's slide from a 40-year low of 163.99 per dollar.

The intervention initially drove the yen to 155.20 per dollar on Aug. 4, its strongest level since early May, before the dollar recovered to the mid-158 range as momentum faded. Citi estimated trading volumes in dollar-yen reached approximately $27 billion during early Monday trading, versus a recent average of around $1.9 billion. Bank of America strategists flagged 155 yen per dollar as a key support threshold, matching the floor seen during previous intervention efforts in April and May.

Rate differentials remain the core driver

The wide interest-rate gap between the US and Japan has been the primary driver of yen weakness for five years. The Fed's July 28-29 FOMC meeting ended with a 9-3 vote to hold rates steady, but Chair Warsh did not rule out a September hike. Governor Lisa Cook said on Aug. 6 that further increases in the short-term rate target may be necessary to address inflation that remains "too high."

On the Japanese side, the BOJ's June minutes showed policymakers discussing upside inflation risks that could warrant further hikes. Nearly all economists in the Reuters survey said the BOJ would need to raise rates for any lasting yen support, with intervention alone seen as short-term "shock therapy."

The coordinated intervention also carried an unusual twist: the US Treasury bought yen using euros rather than selling dollars directly, according to Reuters sources. Treasury Secretary Scott Bessent, a former macro trader who famously shorted the yen, said a stable yen is "very important for the entire region" because other Asian currencies would follow if the yen weakened substantially. DBS Bank chief economist Taimur Baig offered a different interpretation, arguing the US was "serving purely its own bond market stabilization program" given Japan's position as one of the largest foreign holders of US Treasuries.

The dollar index rose 0.32 percent to 99.98 on Thursday as the euro slipped 0.29 percent to $1.1523, while Brent crude fell 0.5 percent to $79.08 per barrel on hopes for progress in US-Iran talks. The yen's trajectory now hinges on whether Friday's jobs data shifts Fed expectations enough to narrow the rate gap — and whether authorities are prepared to intervene again if speculative positioning builds against the yen. A stronger-than-expected reading could have prompted speculative players to rebuild long-dollar, short-yen positions, but the payrolls miss has instead left the market bracing for further yen strength and potential official action.

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