A sharp rise in oil prices is rattling global bond markets as investors weigh the risk of stronger and longer-lasting inflation. With Brent crude moving closer to the $100 mark, concerns are growing that higher energy costs could feed through to the broader economy and keep price pressures elevated.

That shift in sentiment has helped drive a global bond sell-off. When markets expect inflation to stay higher for longer, they often reassess the outlook for central bank policy, leading to fresh pressure on government debt and higher borrowing costs.

The latest move in crude is also changing expectations for interest rates. Investors are increasingly focused on the possibility that policymakers may need to keep rates elevated for longer than previously hoped if energy-driven inflation proves persistent.

The combination of rising oil, inflation worries and changing rate expectations is creating a more difficult backdrop for financial markets. For bond investors in particular, the move in Brent crude has become a key signal for how quickly the outlook on prices and policy can shift.