Yen rally faces moment of truth as BOJ risks disappointing markets

The yen experienced a remarkable rally of 5% against the dollar following a hawkish shift in central bank rhetoric, as US Treasury Secretary Scott Bessent urged the Bank of Japan (BOJ) to do the right thing. This surge was fueled by speculation that Japan's US$2 trillion government pension fund may lead a capital repatriation to invest domestically.

However, despite the yen reaching a near seven-month high at 152.89 per dollar, analysts warn of a potential market disappointment on Friday's policy decision. The market is currently pricing in a near certainty of a Federal Reserve rate hike, which could cancel out the hawkish BOJ wagers that have bolstered the yen. A parallel tightening by both central banks is expected to maintain a wide yield gap of 200 basis points between 10-year bonds, a key driver of the yen's weakness against the dollar.

Additionally, Japan's worsening terms of trade, driven by its heavy reliance on imported oil after the US-Israeli war on Iran, could further contribute to the yen's depreciation. Speculative positioning in yen has flipped to a net long position for the first time since February, but analysts believe this could present a bearish signal for the currency.

Despite optimism about US-centred AI trades, Japanese investors have been shifting towards overseas equities, pouring 1.3 trillion yen into foreign shares in August. However, some investors are anticipating a significant inflow of funds into Japan, potentially reaching hundreds of billions of dollars. While speculative bets on the GPIF's allocation changes are overblown, their governance framework suggests any repatriation would be temporary and not alter the underlying fundamentals pointing to a yen rate of 167 per dollar.