Long-dated yields in Japan, the U.K. and the U.S. all hit old reference points
At 9 a.m. in Tokyo on Sept. 1, a trader froze with a cup of coffee in hand. Japan’s 10-year government bond yield had reached 3.0%, the first time that number had appeared since 1996.
The same day in London, the U.K. 10-year gilt yield climbed to 5.23%, the highest since 2008. The 30-year yield rose to 5.9%, its first appearance at that level since the late 1990s. In New York trading, the U.S. 10-year Treasury yield touched 4.78%, while the 30-year yield reached a high not seen since 2007.
Within a single week, the most important yield curves in the world were pushed to places they had not visited in years. The headlines settled on one word: selloff.
The first spark came months earlier
This was not sudden. The piece traces the starting point to Feb. 28, when the Strait of Hormuz became half-closed for more than half a year. For 184 days, traffic through the passage fell to one-fifth of pre-war levels. The squeeze did not stop at crude oil. Diesel became regionally scarce, the Gulf region accounts for 46% of global urea trade, and Qatar alone supplies one-third of the world’s helium.
Scarcity pushed prices higher. Crude held above $90 a barrel, about 25% above pre-war levels. As energy costs rose, eurozone inflation moved back above 3%. On June 11, the European Central Bank delivered its first rate increase in three years, lifting the deposit rate to 2.25%. The Bank of England followed with similar hints, while markets were also pricing in a September 18 move by the Bank of Japan to 1.25%.
At the same time, the supply of debt was swelling. U.S. federal debt topped $40 trillion, or roughly $120,000 for every American. Across the G7, only Germany still had debt-to-GDP below 100%. Corporations were borrowing too: global corporate bond issuance is set to reach $4.9 trillion in 2026, a record, equal to nearly $20 billion of issuance each working day. Five AI giants alone have sold $220 billion of debt to finance data centers.
More supply, fewer buyers, and buyers demanding higher yields. Bond prices drifted lower for months before the market noticed.
Bessent’s intervention changed the reading, not the trend
One of the central figures in this move is Scott Bessent, the U.S. Treasury secretary. The media has dubbed him America’s bond trader in chief, and he seems comfortable with the label. On Aug. 19, the Treasury doubled its buyback cap from $2 billion to $4 billion, taking its own debt back off the market in an attempt to support prices.
Against a $40 trillion debt load, $4 billion is barely visible. But the market read more into the gesture: the Treasury was trying to manage yields, and the next step could look like disguised money creation. That fed the debasement trade. Gold rose about 10% in August, bitcoin pushed close to $80,000, and mining stocks gained 33% in a month. Traders started calling it the Bessent Bid.
The move did not cap yields. The 10-year Treasury still moved toward 4.75% after the intervention. It helped fuel bitcoin, but not the bond market the Treasury was trying to calm.
Jackson Hole lit the match again
On Aug. 28, the new Federal Reserve chair, Worsh, spoke at Jackson Hole and did not hedge: "Inflation is not slowing." He said he would bring inflation back to the 2% target.
That mattered because markets had been positioned for a hold, and possibly even rate cuts. Once the Fed’s tone changed, global rate pricing had to be repriced. After the speech, the market-implied odds of a September hike jumped from the margins to about two-thirds, then approached 70%.
The second spark came quickly: tensions in the Middle East flared again, oil rose again, and inflation fears were reinforced.
The sequence is straightforward. Oil shocks lift inflation. Central banks move from waiting to hiking. Bonds require a higher yield. Add unprecedented supply on top, and prices break down. Half a year of slow burn turned into a two-week flare-up.
When fiscal borrowing and monetary tightening diverge, long bonds feel it first
Bond markets run on reference points. Numbers like 3% and 5% are not magical, but they anchor expectations. Once those anchors break, stop-loss orders, algorithmic flows and passive funds can all move at once, and selling becomes self-reinforcing until a new anchor appears.
The deeper problem is the split between fiscal and monetary policy. The article argues that rate hikes are meant to restrain inflation, not rescue government debt. Debt belongs to fiscal policy. When governments borrow too much, central banks face a dilemma often described as fiscal dominance. If a central bank tolerates inflation to spare the government’s interest bill, markets quickly conclude that it has been captured by fiscal policy, and they demand more inflation compensation. Long yields then rise even faster. The U.S. in the 1970s is the classic example.
So the logic runs the other way: push up short-term rates, anchor inflation expectations, and long yields may eventually come down. Debt problems, by contrast, need either fiscal tightening or growth. That is not in the central bank’s toolkit.
What investors are buying is not just yield. They are buying whether the central bank is still trusted.
Money moved out of U.S. assets and into Europe, Asia, short duration and gold
In the week before Worsh spoke, the flow data was already clear. U.S. assets saw $22.3 billion of outflows, the third-largest of the year. Money market funds lost $19.7 billion. High-yield debt and energy funds were both seeing withdrawals.
Inflows pointed elsewhere: European equities took in $7.9 billion, Asia attracted $4.8 billion, emerging markets posted a seventh straight week of inflows, short-duration bonds drew $6.3 billion, a seven-week high, and gold funds took in $4.2 billion, a six-month high. That gold flow came before the Jackson Hole speech, making it the tail end of the old trade rather than a fresh response.
The data for the week after the speech had not yet been released. Price action, however, suggested a shift: gold and emerging-market debt were falling, the dollar was rising, and money was rotating back into cash and short-term dollar assets. Last week’s diversification may already be giving way to a return to dollars. The next batch of flow data will confirm whether that is the case.
By early September, gold was trading around $4,360, about 20% below its Jan. 28 peak of $5,420. Debt is still getting heavier. Borrowers are still issuing. Central banks are still hiking. Fiscal authorities are still borrowing. Bessent said it was not a serious situation. Worsh said inflation is not slowing. The market said nothing. It was just counting.