Oil Route Disruptions Push Crude Toward $110 as Bond Yields Surge

The compounding supply constraints pushed Brent crude oil prices up by as much as 4% on Monday to nearly $110 a barrel, reaching their highest point since May as the conflict entered its seventh month with no immediate diplomatic resolution in sight. Simultaneous disruptions across critical Middle East energy corridors have severely constricted global petroleum supplies, pushing crude prices higher and intensifying inflationary pressures that are cascading through international financial markets.

A drone strike disabling Saudi Arabia’s East-West Pipeline and the seizure of the Bab al-Mandab Strait by Iran-backed Houthi rebels have choked off primary alternative bypasses for Persian Gulf oil exports. Commercial tanker traffic through the Strait of Hormuz has also remained far below prewar levels, even under U.S. military escort operations.

The infrastructure failures have forced sustained drawdowns of the U.S. Strategic Petroleum Reserve, pushing emergency stockpiles to their lowest levels in more than 40 years. Economists note that the prolonged duration of elevated inflation limits the ability of monetary authorities to treat energy-driven price spikes as temporary phenomena.

“After several years in which inflation has run above target, it has become harder for policymakers to ‘look through’ the otherwise temporary effects of higher inflation caused by supply shocks,” Neil Shearing, group chief economist at Capital Economics, wrote in a Monday analysis.

The persistent surge in energy costs is reshaping expectations for central bank monetary policy. Federal Reserve officials, who convene Wednesday for their scheduled policy meeting, are widely expected to deliver another interest rate hike. With U.S. inflation remaining continuously above the central bank’s 2% target for more than five years, some Wall Street institutions are now forecasting a total of three additional rate increases during the current tightening cycle.

Peer central banks in Europe and Asia are expected to match the hawkish trajectory. The outlook triggered a global sell-off in sovereign debt markets, with benchmark 10-year U.S. Treasury yields briefly crossing the 5% threshold on Monday before paring gains.

That was the first time the rate hit the benchmark since late 2023, marking an advance of more than 100 basis points since late February, when 10-year yields traded below 4% prior to the outbreak of the war. Equivalent government bond yields across major European and Asian markets experienced parallel upward movements.

The escalation in sovereign borrowing costs comes against a backdrop of elevated public sector indebtedness. The total U.S. federal debt now exceeds 100% of gross domestic product, a level unseen since the immediate aftermath of World War II, increasing the government’s sensitivity to rising debt-servicing expenses.

Shearing noted that while nominal economic growth currently remains above average interest costs—preventing an immediate sovereign fiscal crisis—the convergence of elevated public debt and large budget deficits creates a potential feedback loop.

“More importantly, in a world of high public debt and large fiscal deficits, there is a potential feedback loop through the bond market that could make a difficult situation considerably worse,” Shearing stated. “Those concerns can push bond yields higher still, creating a self-reinforcing cycle in which rising yields feed fiscal worries, which in turn drive yields higher.”

He added that from a macroeconomic perspective, the primary risk to the global economy stems less from the initial commodity shock than from the market dynamics it threatens to trigger. The surge in risk-free interest rates reverberated across equity markets on Monday, led by a sharp decline in technology stocks.

Semiconductor producers and major cloud-computing technology firms—often referred to as hyperscalers—suffered notable losses after leading recent equity advances driven by artificial intelligence infrastructure spending. A 10-year Treasury yield persisting above 5% represents a historic upper boundary for long-term borrowing costs, which have generally remained below that level since the early 2000s dot-com bubble.

In an op-ed published last week in the Financial Times, Ruchir Sharma, chairman of Rockefeller International, warned that a sustained breach of the 5% yield threshold poses structural challenges for capital-intensive technology investments. Sharma noted that higher debt yields make it substantially more expensive for technology corporations to issue bonds to fund data centers and advanced hardware purchases, while high interest rates simultaneously create headwinds for issuing new equity.

Sharma observed that because the total U.S. debt burden relative to GDP is significantly higher today than during previous rate-hiking cycles, rising public borrowing costs will transmit faster to private sector borrowers, imposing acute pressure on highly valued technology segments.