Yen Struggles to Gain Traction Despite Weaker Dollar

USD/JPY traded near 157.96301 on Friday, largely unchanged, but is heading for its first weekly decline in five weeks. Despite a significant weakening in the dollar, the yen has failed to draw meaningful support, underscoring its still-fragile fundamental backdrop.

**Why Dollar Weakness Isn't Lifting the Yen**

Under traditional FX pricing logic, a weaker dollar typically implies strength in non-dollar currencies. Yet the yen has remained under persistent pressure against the trend. Market data shows that since early April, the dollar index has fallen steadily from near 100 to as low as 97.60, erasing all gains from earlier geopolitical tensions. But the yen has not strengthened in tandem, instead hovering near multi-year lows. Even repeated verbal intervention signals from Japan's Finance Minister have failed to reverse the yen's decline.

**US-Japan Yield Gap Is the Core Drag**

This misaligned pattern of a "weak dollar and even weaker yen" stems from the decoupling of the two sets of forces driving the dollar and the yen. Since ending negative rates in March 2024, the Bank of Japan has hiked rates four times cumulatively, most recently raising rates to 0.75% in December 2025, yet this still forms a structural yield chasm against the US's high-rate policy mix. According to recent remarks by Chicago Fed President Austan Goolsbee, rate cuts could be delayed until 2027, keeping US Treasury yields elevated and directly fueling continued expansion of carry trades. Investors borrow low-cost yen, convert it into dollar-denominated or other high-yield assets to capture the spread, generating relentless selling pressure on the yen.

**Intervention Effects Fade Quickly**

Earlier, the US and Japan made a rare joint intervention to buy the yen, pushing USD/JPY down from above 163 to near 155.20, but within just a few days nearly half of those gains were given back, with the pair drifting back toward 159. Analysts note that official intervention only shifts FX buying and selling flows for a few days and does not change the fact that dollar asset yields remain more than two percentage points higher than yen assets. Whether the yen can truly strengthen depends on a sharp drop in energy prices or a significant decline in US rates, along with a substantial narrowing of the US-Japan yield gap.