Japan's suspected yen intervention sinks dollar 3%, lifts gold 1.5%

Japan's government likely intervened in currency markets Thursday, sending the dollar down as much as 3 percent against the yen and lifting gold 1.5 percent as traders piled into haven assets.

"It is hard to imagine anything other than currency intervention causing a drop of as much as five yen in such a short period of time," said Daisaku Ueno, chief FX strategist at Mitsubishi UFJ Morgan Stanley Securities.

The dollar fell to 158.34 yen from 40-year highs near 164 earlier this week, its weakest since May 14. Citi's eTrading desk recorded an estimated $8.1 billion of dollar-yen selling between 0930 and 0940 ET alone. The dollar index tumbled 0.91 percent to a six-week low, while August COMEX gold rose 1.45 percent. The move followed data showing US Q2 GDP grew at a 1.5 percent annualized rate, below the 2.1 percent consensus, while the core PCE price index — the Fed's preferred inflation gauge — eased to 3.3 percent from 3.4 percent in May.

The suspected intervention exploits a window of dollar weakness opened by the soft US data and Wednesday's Fed decision to hold rates at 3.50 percent to 3.75 percent. With the Bank of Japan's rate verdict due Friday, traders now face the prospect of sustained yen strength that could upend the carry trade, a strategy that has generated billions in returns for hedge funds this year.

The timing caught many market participants off guard. Most had expected any intervention to come after the Fed and BOJ meetings, according to Ueno. "There may have been an intention to catch the market off guard," he said.

Roberto Cobo Garcia, head of G10 FX strategy at BBVA, said Japanese authorities appeared to have "taken advantage of the bearish momentum generated by the weaker US data to sell dollars and support the yen."

The euro rose to a six-week high, gaining 0.48 percent against the dollar, after data showed Eurozone Q2 GDP grew 0.4 percent quarter-on-quarter, double the consensus estimate. The single currency's strength added to dollar headwinds, creating a feedback loop that accelerated the yen's gains.

The last time Tokyo intervened to support the yen was in October 2022, when the dollar-yen pair traded near 152. That intervention cost Japan roughly $42 billion and temporarily halted the yen's slide before it resumed months later. This time, the move comes as the BOJ prepares to announce its latest rate decision Friday, with markets pricing just a 1 percent probability of a quarter-point hike from the current 1.00 percent policy rate.

For gold, the combination of a weaker dollar and shifting Fed expectations proved potent. The dollar's decline makes bullion cheaper for holders of other currencies, while lower rate expectations reduce the opportunity cost of holding non-yielding assets. Gold ETFs have seen outflows in recent weeks — long holdings fell to a 10-month low — but Thursday's price action suggests a reversal may be underway.

The broader implications extend beyond yen and gold. A sustained yen rally would compress profit margins at Japanese exporters such as Toyota Motor Corp. and Sony Group Corp., which have benefited from the weak currency. It could also trigger a wave of margin calls on leveraged yen-short positions, adding to the dollar's decline. The BOJ's decision Friday will determine whether this intervention marks a one-off defense or the start of a coordinated policy shift.

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