Yen Weakens as Japan Government Bond Yields Hit Multi-Year Highs
The USD/JPY pair rose above 157.9, while the 10-year Japanese government bond yield reached 2.6% — the highest since 1997. The yield increase is linked to an OECD forecast expecting the Bank of Japan to raise its policy rate to 2% by the end of 2027.
Yen Weakens Against Logic: Anatomy of Japan's 2026 Liquidity Trap
The Core: What's Really Happening
The market is witnessing an apparent paradox: the 10-year Japanese government bond (JGB) yield has hit 2.6% — a level not seen since 1997 — yet the yen is falling, not rising. The USD/JPY pair has firmly settled above the 157.9 mark. Classical macroeconomic theory suggests that rising yields should attract capital into the currency. But here, a different, more powerful mechanism is at play: the market perceives this rise not as a signal of Japan's economic strength, but as a belated and forced reaction by the Bank of Japan (BOJ) to inflation it can no longer ignore.
In reality, we are witnessing not the beginning of normalization, but the second phase of a structural carry trade crisis. The BOJ is in a position where any action it takes worsens the situation. If it doesn't raise rates, inflation and yen depreciation accelerate. If it does, the cost of servicing Japan's colossal government debt becomes unbearable. The market is focused on this debt overhang, ignoring the nominal yield increase.
Timeline and Context
The roots of the current situation go back to March 2024, when the BOJ finally abandoned its negative interest rate policy. By May 2026, the rate had risen to 0.75%. Yet even after this, Japan remains the country with the lowest yields among developed economies — the gap with the US Federal Reserve's rate is around 300 basis points.
The key moment occurred around April-May 2026. The yen broke through the psychological 160 level against the dollar, forcing the BOJ to conduct a large-scale currency intervention. According to analyst estimates, about $35 billion was spent to stabilize the exchange rate. This was the first direct intervention in nearly two years.
On May 13, 2026, the OECD published a forecast stating that the BOJ's policy rate should reach 2% by the end of 2027. This publication triggered a sharp rise in JGB yields to 2.6%. The market immediately priced in future tightening. Meanwhile, within the BOJ itself, a split is growing: some board members insist on a rate hike at the June meeting, while others urge caution.
On the same day, May 13, Japan's Finance Minister issued a statement expressing readiness to take decisive action against speculative attacks on the yen. She cited US-Japan agreements allowing interventions to counter excessive volatility. This statement alone is a sign of extreme concern among authorities.
Winners and Losers
The winners are global hedge funds that have timely adjusted their strategies. Those who shifted early this year from classic short carry trades (short yen / long dollar) to buying volatility are now reaping super profits. Open interest in yen futures on the CME has risen 39% over the year, reaching 287,715 contracts, creating fertile ground for sharp moves in either direction.
The losers are Japanese pension funds and insurance companies. GPIF, Japan's largest pension fund, has for years maintained extremely low hedging of currency risks on foreign investments. In effect, it made an unsecured bet on a weak yen. Now, with volatility spiking and JGB yields rising, these institutions face a painful choice: book losses from revaluing currency positions or urgently increase hedging, which would put additional pressure on the yen.
Also losing is the global risk asset market. The yen remains the primary funding currency for carry trades. When USD/JPY volatility spikes, VaR models trigger, forcing traders to cut positions not only in the currency market but also in US stocks, especially the tech sector. August 2024 already showed how quickly this spiral can unwind: the USD/JPY pair then crashed from 161 to 141.7 in three weeks.
What the Media Isn't Saying
Most commentators focus on the interest rate differential and central bank actions. But they overlook the main structural contradiction: the Japanese government's debt trap.
Japan's total government debt exceeds 250% of GDP. With the 10-year JGB yield rising to 2.6%, the cost of servicing this debt begins to grow exponentially. Japan's Ministry of Finance physically cannot allow further yield increases without risking a fiscal crisis. This leads to a non-obvious insight: the BOJ will likely resume a covert form of yield curve control in the coming months. It won't announce it publicly — that would undermine confidence in the normalization policy. But when the 10-year yield reaches 2.8-3.0%, the BOJ will start aggressively buying bonds, disguising it as "market stability operations."
The second underestimated factor is the strict constraints imposed by IMF rules on currency interventions. Japan is classified as a country with a freely floating exchange rate. According to IMF rules, no more than three interventions, each lasting up to three days, are allowed within a six-month period. The May intervention of $35 billion has already used one of these precious slots. Until November 2026, Japan has only two attempts left. If the price quickly returns to 160 — and the market knows these constraints — speculators will have a virtually guaranteed target for attack.
Forecast: Next 30 and 90 Days
In the next 30 days, the USD/JPY pair will consolidate in the 156-160 range. Support comes from the 50-day exponential moving average around 158, resistance from the psychological 160 level, beyond which looms the possibility of another intervention. The BOJ's June meeting becomes a key event. A rate hike to 1.0% could cause a short-term yen strengthening to 153-154, but this effect will be temporary — the fundamental rate differential will remain too wide.
The real risk of the June meeting lies not in the rate decision itself, but in the accompanying comments. If BOJ Governor Kazuo Ueda signals that the pace of normalization will accelerate, it will trigger not a yen strengthening but a collapse in the JGB market. The 10-year yield could jump to 3.0% within days, threatening margin calls for Japanese banks holding huge government bond portfolios.
Over a 90-day horizon, a break above 160 is most likely. The reason is a combination of two factors: the exhaustion of intervention capacity and the approach of elections in Japan. The ruling party is not interested in sharp monetary tightening before the vote, when it is important to support economic activity and employment. By the end of August, USD/JPY could reach 162-163.
A strategically important point: the net short position in yen futures has shrunk to 70,552 contracts, the lowest level in nearly a month. This means the market has partially cleared excess shorts. With a new wave of yen weakening, speculators have room to maneuver — they can build positions without fear of an immediate squeeze.
The only factor that could reverse the trend in favor of the yen is a US recession with an emergency Fed rate cut. But the probability of such a scenario in the next 90 days is estimated by the market at less than 15%. Without this catalyst, the yen is doomed to further weakening, however paradoxical it may seem against the backdrop of rising bond yields.
— Editorial Team
