Gulf Tensions Lift Oil Above $110, Pushing Yields to 15-Month Highs

U.S. Treasury yields held mostly steady Monday following a sharp increase last week that reflected investor concerns over higher energy costs and their potential to sustain inflation. The 10-year note yield edged down one basis point to 4.587 percent, after touching its highest level in 15 months during the prior session. The 30-year bond yield also slipped one basis point to 5.119 percent, while the two-year note yield moved to 4.071 percent.

The moves came after yields climbed across major economies amid evidence that elevated oil prices are feeding through to broader price pressures. Brent crude rose about 1.2 percent to near $110.55 a barrel, with U.S. crude up 1.4 percent to $102.48. Futures contracts for later in the year traded above $100, indicating expectations that supply constraints could linger. A series of drone incidents in the Gulf region, including strikes near a nuclear facility in the United Arab Emirates and interceptions reported by Saudi Arabia, added to uncertainty over shipping routes.

The Strait of Hormuz, which normally carries roughly one-fifth of global oil and gas trade, has seen sharply reduced traffic as Iranian authorities seek greater control. Analysts noted that markets are incorporating the risk of prolonged disruptions. This development coincides with fresh U.S. data showing consumer-level price increases, reinforcing worries that energy costs could keep inflation above target levels for longer.

Similar patterns appeared in other bond markets. German 10-year yields rose above 3.18 percent, and Japanese 10-year yields reached their highest point since 1996. British gilts followed the broader upward trend. Treasury Secretary Scott Bessent met with G7 counterparts and central bankers in Paris to address energy security and critical materials, though differences among participants limited immediate coordination.

Federal Reserve policy remains a key variable for short-term rates, yet longer-term yields have responded more directly to fiscal and supply-side factors. Persistent government borrowing needs and elevated public debt levels have kept pressure on longer maturities, as investors demand higher returns to absorb additional supply. These market signals operate independently of official statements and reflect accumulated imbalances rather than temporary sentiment.

European Central Bank President Christine Lagarde acknowledged ongoing vigilance over volatility, describing it as part of the institution's core responsibilities. Central banks across regions face the same basic constraint: attempts to suppress yields through heavy intervention have often proven temporary when underlying supply conditions deteriorate. Oil's renewed climb has exposed the limits of relying on demand management alone to contain price growth.

Equity markets retreated in tandem with the bond moves. Technology shares, which have led recent gains, face particular scrutiny this week as Nvidia reports earnings. Higher borrowing costs can weigh on valuations for growth-oriented companies, illustrating how energy-driven inflation transmits through capital markets. Investors appear to be repricing assets based on the prospect of sustained higher input costs rather than assuming rapid reversion to prior trends.

Historical patterns show that supply shocks in energy markets tend to produce durable effects on inflation expectations when they coincide with already loose fiscal conditions. Markets have adjusted yields upward to account for these realities, providing a clearer picture of underlying pressures than forward guidance alone. Policymakers in Washington and abroad continue to weigh responses, yet the price mechanism continues to register the combined impact of geopolitical friction and domestic spending levels.