The US 10-year Treasury yield has surged through the critical 5% threshold, marking its highest level in nearly two decades as global fixed-income markets grapple with the compounding pressures of surging crude prices, expanding government debt issuance, and the voracious financing demands of the artificial intelligence boom. This historic milestone has not only dragged Asian equities and bonds lower in tandem but has also sharpened market focus squarely on Wednesday's Federal Reserve interest rate decision—a pivotal moment that could determine the trajectory of the bond market.

On Tuesday, the US 10-year Treasury yield climbed as much as 4 basis points to 5.02%, surpassing its 2023 peak and reaching levels not witnessed since 2007. The immediate catalyst behind this rally is the escalation in global oil prices—Brent crude advanced 1.6% to approximately $107.30 per barrel—with a key Saudi Arabian pipeline remaining offline following an attack, keeping Middle East supply risks firmly elevated.

Meanwhile, Japan's 30-year government bond yield rose 5.5 basis points to 4.12%, and Australia's 10-year yield surged 9 basis points to 5.42%, underscoring that the global bond selloff now knows no borders. The turmoil in fixed income has rapidly spilled over into other asset classes. Asian equities slipped 0.6% collectively, with Japan's Topix index falling 0.7%, South Korea's KOSPI at one point sliding more than 1.5%, and Australia's ASX 200 dropping 1%. US equity futures also weakened, with S&P 500 futures down 0.3%.

Beyond the pressure emanating from bond markets, the contentious debate over artificial intelligence regulation is also unsettling investor sentiment. Global equities had already retreated on Monday following warnings from leading AI developers, with multiple companies urging a slowdown in technology deployment to prevent potential catastrophic consequences of uncontrolled AI. President Trump promptly criticized the stance taken by the CEO of Anthropic, further intensifying policy divisions surrounding AI oversight.

Chris Armstrong, strategist at Berenberg, noted, "The market was already quite tense, and when major participants begin suggesting the need to apply the brakes, it only amplifies the prevailing uncertainty."

Key movements across global markets:

Equities: S&P 500 futures declined 0.3%; Japan's Topix dropped 0.7%; Australia's ASX 200 fell 1%; Euro Stoxx 50 futures were largely flat.

Bonds: The US 10-year yield added 3 basis points to 5.02%; Japan's 10-year yield rose 2.5 basis points to 3.020%; Japan's 30-year yield climbed 5.5 basis points to 4.12%; Australia's 10-year yield gained 9 basis points to 5.42%.

Commodities: West Texas Intermediate crude advanced 1.8% to $103.17 per barrel; Brent crude rose 1.6% to approximately $107.30 per barrel; spot gold was broadly unchanged at around $4,300 per ounce.

FX: The Bloomberg Dollar Spot Index inched up 0.1%; the euro slipped 0.1% to $1.1536; the yen weakened 0.3% to 154.75 per dollar; the Australian dollar fell 0.3% to $0.7121.

Cryptocurrencies: Bitcoin declined 1.9% to $77,584.98; Ethereum dropped 3.1% to $2,491.97.

Triple Threat Fuels Bond Market Selloff

The current global bond market rout cannot be attributed to any single factor; rather, it stems from the convergence of multiple structural pressures.

According to reports, since the US initiated military action against Iran in late February, disruptions to Middle East oil and gas supplies have persisted, driving global bond yields steadily higher. Escalating crude prices have directly reinforced inflation expectations, compelling bondholders to demand greater yield compensation.

Concurrently, corporations are borrowing heavily to finance AI-related expenditures, injecting substantial debt supply into markets while simultaneously stimulating an already robust US economy—creating an unfavorable dynamic of increased supply coupled with sustained demand pressure.

Government debt issuance continues to expand across major economies, both for refinancing maturing obligations and covering fiscal deficits. However, with central banks having exited quantitative easing purchase programs, demand from traditional buyers has cooled, leaving markets increasingly reliant on price-sensitive investors.

Phoebe White, head of US rates strategy at UBS Group, commented, "Given that the real economy shows no signs of weakening, and the supply-demand dynamics in the Treasury market are vastly different from 2007, the downside for long-end yields appears quite limited. Structural demand from traditional buyers such as foreign official institutions has notably diminished."

Notably, analysts point out that the 10-year Treasury yield breaking above 5% is beginning to undermine equity market valuation logic.

Grace Peters, global head of investment strategy at JPMorgan Private Bank, stated, "If bond yields move to 5% or even 5.25%, I believe equities will experience significant indigestion. The 5% figure carries substantial psychological weight."

Mark Cranfield, market strategist at Bloomberg, observed that the widening divergence between crude oil and gold suggests macro traders may need to contend with the breakdown of cross-asset correlations for an extended period. "They are losing confidence in a 'circuit breaker' capable of suppressing oil prices and restoring market risk appetite."

Fed Decision Takes Center Stage

Wednesday's Federal Reserve rate decision represents the largest source of uncertainty currently facing markets. Trader pricing now indicates a probability of over 90% for a rate hike.

Vail Hartman, strategist at BMO Capital Markets, remarked, "If the Fed holds rates steady this week, it will be extremely difficult to avoid damaging its anti-inflation credibility. The market is highly sensitive not only to an unexpected pause but also to a 'dovish hike' that conveys a more patient stance through the dot plot or press conference."

Xiao Cui, senior economist at Pictet Wealth Management, noted in a research report that Fed Chair Warsh lowered the threshold for rate increases at the Jackson Hole symposium; failure to act now would undermine institutional credibility and push long-end yields even higher.

"Therefore, we anticipate Warsh will deliver hawkish signals at the press conference—not to exceed market expectations regarding the rate hike trajectory, but rather to reinforce the Fed's commitment to price stability and provide an anchor for long-end yields."

Zach Griffiths, head of investment grade and macro strategy at CreditSights, commented, "There are currently numerous deep-seated factors supporting sustained upward pressure on rates; this is the path of least resistance." He projects the 10-year yield could potentially advance further toward 5.5%.