Yen Once Surges to 162.84

The yen experienced sharp volatility this week, with USD/JPY rebounding significantly after hitting its lowest level since 1986, as market focus centered on possible foreign exchange intervention by Japanese authorities and the impact of U.S. economic data on expectations for Federal Reserve policy.

On Tuesday (June 30), USD/JPY rose to 162.84 at one point, marking a 40‑year high. The core factor behind the yen’s weakness was the widening U.S.-Japan interest rate differential—the yield premium of 2‑year U.S. Treasuries over Japanese government bonds had expanded to 2.79%, making short‑term U.S. fixed‑income assets far more attractive than Japanese ones. Meanwhile, international oil prices fell below $75 per barrel, suppressing upward inflationary pressure in Japan and reducing the urgency for the Bank of Japan to raise rates further.

However, the market took a sharp turn on Thursday (July 2). During the handover between Asian and London trading sessions, the yen suddenly surged 0.5%, pushing USD/JPY down to 161.115 at one point. Reuters quoted sources as saying that the Japanese Ministry of Finance is abandoning its previous practice of signaling intervention in advance, adopting instead an “ambush‑style” strategy to hit yen shorts unexpectedly. Analysts pointed out that net short positions in yen futures remain near two‑year highs, making targeted intervention likely to trigger a short‑covering rally.

On Friday (July 3), U.S. June non‑farm payroll data provided further support for the yen. The data showed a clear slowdown in U.S. employment growth, with downward revisions to the previous two months, causing the market‑implied probability of a Fed rate hike in September to plummet from 64% to 52%. The U.S. dollar index fell about 0.7% for the week, its largest weekly decline since early April. As of Friday, USD/JPY was trading around 161.03.

Finance Minister Katayama Satsuki reiterated at a Friday press conference that the Japanese government is “ready to respond appropriately whenever necessary.” She also emphasized that Japanese and U.S. authorities are maintaining close communication on exchange rate issues. However, the market remains on high alert for intervention risk—as U.S. markets were closed on Friday for the Independence Day holiday, thin liquidity was seen as an ideal window for Japanese authorities to act.

On the technical front, analysts view 162.83 as a short‑term top for USD/JPY. An FX strategist at OCBC noted that as long as Fed tightening expectations remain intact, the dollar’s overall strength against low‑yielding currencies is likely to persist. At the same time, Japan’s 10‑year government bond yield rose to a near 30‑year high on Friday, reflecting concerns over Prime Minister Sanae Takaichi’s fiscal expansion plans.

Looking ahead, the yen’s direction will mainly depend on upcoming U.S. economic data and the evolution of the Bank of Japan’s monetary policy path.