Japan just showed its hand completely. Revised GDP figures released Tuesday showed the economy expanded an annualised 1.4% in the second quarter, up from the initial estimate of 1.1%. The upward revision reflects capital spending data showing Japanese firms increased spending on plant and equipment by 1.6% in the second quarter from a year earlier. Combined with real wages rising 2.4% in July from a year earlier, the biggest increase since May 2021 and the seventh consecutive month of gains, the Bank of Japan now has everything it needs to move.
Swap rates are signaling that a September hike is close to fully priced. The question for traders is not whether the hike comes, but what it does to everything downstream.
What the Reserve Drawdown Actually Signals
Japan’s reserves stood at $1.208 trillion at the end of August, down by a record $79.6 billion, or 6.18%, from $1.287 trillion a month earlier, according to Ministry of Finance data.
The decline was led by a drop in foreign securities, held mostly in U.S. Treasuries bought during dollar-buying intervention conducted around two decades ago, which account for about 70% of Japan’s reserves. Japan likely sold a portion of its holdings of foreign securities, including U.S. Treasuries, to finance its record currency intervention, with Tokyo’s holdings of foreign securities falling $87.8 billion at the end of August from a month earlier.
That Treasury liquidation is the underappreciated pressure point. Every time Japan sells U.S. government debt to defend the yen, it adds supply to the long end of the Treasury market. Upward pressure on U.S. yields does not require the Fed to act. Japan can do it passively, through necessity.
The Yen and the Nikkei Are Pulling in Opposite Directions
The yen strengthened to around the 153.5 per dollar area Tuesday morning, the strongest since February. Japan spent 15.4 trillion yen on intervention between July 30 and August 26, marking the largest intervention operation on record in a single month. That scale of commitment moved the currency from near 40-year lows toward 155, and the GDP revision this morning pushed it further still.
The benchmark Nikkei 225 advanced 0.31% to 66,608 in early trading Tuesday, which looks resilient until you examine who is absorbing the losses. A BOJ rate increase tends to strengthen the yen, and a stronger yen compresses the earnings of Japan’s large export-driven companies when they convert overseas revenues back into domestic currency. The fact that the market is pressing higher signals that investors are betting on an incremental hike if it comes. That bet could be right, but exporters remain structurally exposed at any yen level below 150.
JGB yields, with the 10-year benchmark having recently touched 30-year highs around 2.9%, would probably extend their climb on a stronger GDP reading, tightening financial conditions further and pressuring rate-sensitive sectors of the Nikkei even as exporters gain from the reinforced growth outlook.
The Trade
The clearest positioning ahead of September 17-18: short the dollar against the yen with defined risk above 156, where intervention threat re-emerges. EWJ, which carries heavy exposure to export-oriented manufacturers, is the vehicle to watch for the equity leg. The BOJ raised its policy rate to a 31-year high of 1% in June as it focused on price pressures tied to the Iran war-driven energy shock and the yen’s weakness. A 25-basis-point move to 1.25% is unlikely to break the tightening cycle.
The primary risk to this framework is not a BOJ surprise. It is whether a firming yen triggers a larger unwind in export-stock positions than the market currently anticipates. Traders should size positions accordingly and monitor the 153 handle in USD/JPY as the first technical tell of whether this yen rally has legs past the meeting date.
