Global bond markets are in the middle of one of their sharpest selloffs in decades, and the U.S. is about to face two major tests in the same overnight session. In Beijing time early on Aug. 20, the U.S. Treasury is set to auction $16 billion of 20-year bonds, and the Federal Reserve will release the minutes of its July meeting at 2 a.m. The first event targets the long end of the curve. The second could reset expectations at the short end.
The market scenario drawing the most concern is a weak auction combined with hawkish minutes. If both arrive on the same day, they could reinforce each other, push the full Treasury curve higher, and spill over into technology stocks, emerging markets and leveraged trades.
Long-dated yields had already climbed close to multi-year, and in some cases multi-decade, highs before either event. The U.S. 30-year Treasury yield touched 5.327% intraday on Tuesday, its highest level since June 2007. The 10-year yield rose to 4.747%, a new high since January 2025. U.S. equities have also been under pressure, with the S&P 500, Nasdaq Composite and Dow Jones Industrial Average all falling for three straight sessions.
Auction to test whether buyers will return at current yields
The 20-year bond sale is expected to price near a yield of 5.28%, matching the secondary-market yield on outstanding 20-year Treasurys on Tuesday. That would mark the highest borrowing cost for that maturity since the Treasury restarted issuance six years ago.
The significance of this auction goes well beyond routine funding. The U.S. fiscal deficit has reached nearly $1.8 trillion so far this fiscal year, and total federal debt is approaching the $40 trillion mark for the first time. In last week’s 30-year Treasury auction, the high yield came in at 5.216%, the highest in about 25 years. The Congressional Budget Office also raised its forecast for the fiscal 2026 budget deficit to $2.1 trillion last week, up $200 billion from its February projection.
The core question for investors is whether buyers are willing to come back at these yield levels. If the stop-out yield lands clearly above pre-auction levels and bidding demand comes in soft, that would point to a further deterioration in long-term debt supply and demand, leaving more room for long-end yields to rise.
Yulia Alekseeva, head of fixed income at MissionSquare, said deficit concerns have been the "primary and most persistent driver" behind the recent selloff in long-dated Treasurys. She also said a wave of long-duration corporate bond issuance by hyperscalers building data centers has added to supply pressure. According to Goldman Sachs trading desk data, AI-related bond issuance has reached $489 billion. Rich Privorotsky, Goldman’s head of European cash trading, issued a stark warning: 「To some degree, the Fed may even be forced to raise rates into weakening data in order to flatten the curve and re-anchor long-end rates.」
Fed minutes could reveal how broad the hiking camp has become
The July Fed minutes carry more weight than usual, according to the report.
It said Fed Chair Warsh has sharply reduced forward guidance since taking office. Policy statements have become shorter, and press conferences have offered little in the way of directional interpretation. Michael Gregory, deputy chief economist at BMO Capital Markets, wrote in a client note that the minutes have become much more important under a setup defined by "brief policy statements, vague press conferences and less forward guidance." Will Compernolle, macro strategist at FHN Financial, said the minutes "may now reveal internal discussions that were not disclosed in Warsh’s ambiguous press conference last month."
The July meeting left one clear question for markets. The Fed kept rates unchanged at 3.5% to 3.75%, but three of the 12 voting members directly supported a rate increase. Alex Pelle, a U.S. economist at Mizuho, expects those three votes may be only "the tip of the iceberg" and that the minutes will show support for a hike is more widespread among the Fed’s 19 senior officials than markets currently assume. "Since the start of the year, every Fed meeting has had more hawkish officials," Pelle said.
June minutes had already sketched two policy paths. If inflation pressures ease quickly, most officials prefer to keep rates unchanged and eventually loosen policy. If AI-related spending, the Middle East conflict and tariffs continue to lift inflation, most officials see the possibility that further rate hikes may be needed. Kurt Lewis, head of central bank policy at Piper Sandler and a former Fed official, said that means more than half of the committee has already considered both scenarios, calling it "significant."
The Atlanta Fed’s market probability tracker currently shows the chance of a September rate hike has fallen to 59% from 82% after the July meeting, mainly because of softer inflation data in recent weeks. If the minutes show stronger hawkish sentiment than markets expect, those cooling hike expectations could quickly return.
Higher yields are adding pressure to technology stocks
Jonathan Krinsky, chief technical strategist at BTIG, warned in a report: 「We believe the stock market is not prepared for a rapid rise in the long end — for example, if the 30-year yield moves toward 6%.」 He said the 30-year Treasury yield has broken above a three-year trading range since early August, and the technical picture suggests the selloff is not over.
John Velis, BNY’s Americas FX and macro strategist, said the surge in long-end yields reflects both the market’s view of the long-run path for monetary policy and a jump in funding demand tied to technology and AI capital spending. 「This is not directly crowding out Treasury investment, but it is pushing up the cost of capital across the board,」 he said.
Historical comparisons are also resurfacing. Data compiled by the X account Oddstats shows the only time in history when the 30-year Treasury yield moved from the 4% range to the 6% range within six months was in June 1999. Less than four months later, the S&P 500 entered correction territory. Nine months later, the index posted its last record high before the dot-com bubble burst. For comparison, the 30-year yield was still below 4.6% in March this year.
If hawkish minutes and a weak auction arrive together, the market logic is straightforward. Short-end rates would come under pressure as rate-hike expectations firm up, while long-end yields would keep rising if demand for long-dated debt remains insufficient. That would force a repricing across the full curve. High-valuation technology stocks would be among the first to feel it, because higher long-end yields raise discount rates and lower theoretical equity valuations, while higher short-end rates increase corporate funding costs at the same time.
The selloff is no longer just a U.S. story
The bond-market strain has already spread across major developed economies. Germany’s 30-year government bond yield climbed to a 15-year high of 3.763%. France’s yield at the same maturity reached its highest level since 2008. Japan’s 30-year government bond yield rose to 4.1285%, above the 30-year high set earlier this spring. According to data compiled by Bloomberg, the average yield on an investment-grade sovereign benchmark basket has jumped to about 4.5%, the highest since records began in 2015.
Luis Alvarado, co-head of global fixed income at the Wells Fargo Investment Institute, said: 「Nearly all major fixed-income markets are showing the same trend. The deficit issue is global; this is not a U.S.-only story.」 At the same time, he stressed that the U.S. Treasury market is far larger than the combined government bond markets of Japan, the U.K., the European Union and other Asian countries, giving U.S. developments much stronger spillover potential.
Charles Luke, chief investment officer at City National Bank and RBC Rochdale, said some capital is rotating back into other markets as global rates rise, and 「that naturally puts some pressure on overseas buyers of Treasurys.」 He added: 「I think the Treasury is definitely a little nervous right now.」