A synchronized drop in government bond prices has pushed borrowing costs across major economies toward levels last seen around the 2008 crisis. A Bloomberg gauge of global sovereign yields climbed to about 3.72 percent, its highest reading since mid-2008, as investors demanded more compensation to hold long-dated debt.
Japan’s 10-year government-bond yield touched 3 percent for the first time since 1996. Britain’s 30-year gilt yield rose to territory last visited in 1998, while the UK 10-year yield reached its highest mark since 2008.
German 10-year yields moved to levels last seen in 2011.
In the United States, the 10-year Treasury yield approached 4.80 percent, its strongest since early 2025, and the 30-year yield remained near multi-year highs.
Yields move in the opposite direction to prices, so the surge marked a genuine rout in the world’s safest paper.
Several forces lined up at once.
A fresh flare-up between the United States and Iran lifted oil prices, with Brent crude jumping toward the mid-$90s and stoking fears that energy inflation would prove sticky.
That shift quickly changed rate expectations.
After a hawkish Jackson Hole speech by Federal Reserve Chair Kevin Warsh, traders raised the chance of a quarter-point U.S. rate increase this month to roughly two-thirds or higher. Markets also priced tighter policy from the Bank of Japan and the European Central Bank.
Fiscal arithmetic added pressure.
US public debt has crossed $40 trillion, and debt-to-GDP ratios sit at or above 100 percent across most of the G7.
Heavy government issuance now competes with a wave of corporate borrowing: five large AI-focused technology firms have sold about $220 billion of bonds this year to fund data centers and models, helping lift global corporate issuance to a record.
More supply means lenders can charge more.
US Treasury buybacks, expanded under Secretary Scott Bessent, offered only brief relief before long-dated yields climbed again.
Bond yields are the benchmark against which stocks are valued.
When safe government paper pays more, future corporate cash flows look less attractive on a discounted basis, and capital can rotate from equities into fixed income.
US indexes closed lower as the rout intensified: the S&P 500 fell about 0.7 percent, the Dow about 0.8 percent, and the Nasdaq about 1 percent, with consumer-discretionary and chip names among the weakest.
Energy shares were a partial exception as oil rallied.
Higher yields also feed through to mortgages, auto loans, and small-business credit. US 30-year mortgage rates have already risen to a one-year high near 6.7 percent.
That tightening of financial conditions raises the odds that growth and earnings slow if the selloff persists. Strong profits have so far limited the damage in equity markets, but a further climb in the 10-year Treasury yield toward 5 percent would test that buffer, especially in richly valued growth stocks whose prices depend on distant cash flows.
Digital assets did not escape the same repricing. Bitcoin slipped from near $79,000 to a session low around $76,500 before stabilizing near $77,000 to $78,000.
The broader crypto market lost tens of billions of dollars in capitalization as European and US bond sessions sold off.
Higher real yields and a firmer dollar make non-yielding assets harder to hold, particularly when leveraged funds reduce risk across markets.
Some investors still treat bitcoin as a hedge against fiscal debasement and official attempts to manage long-term rates, but in this episode it traded more like a high-beta risk asset than an independent store of value.
Altcoins generally followed the same path, with liquidity thinning as traders cut exposure.
The near-term path for bonds, stocks, and crypto depends on oil, incoming jobs data, and whether governments restrain issuance or economic growth outruns the rising interest bill. Until one of those changes, more expensive money is likely to keep pressure on risk assets.