Global borrowing costs hit fresh highs as oil prices surge and inflation fears rise

Long-term borrowing costs across several of the world's biggest economies have climbed to fresh highs, with investors reacting to rising oil prices, inflation concerns and questions over heavy spending on artificial intelligence. The move has been seen in the United States, the United Kingdom, Germany and Japan, underlining how quickly market pressure has spread across major debt markets. The rise is feeding into expectations that borrowing could become more expensive for households, companies and governments.

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In the United States, the interest rate on 30-year borrowing reached 5.33% on Tuesday, its highest level since June 2007. In the United Kingdom, long-term debt rose to 5.85%, while similar moves were reported in Germany and Japan. Bond yields, which are the returns investors demand on government debt, can influence the cost of mortgages, car loans and credit cards, making the latest move significant beyond financial markets.

The immediate driver appears to be a jump in oil prices, with Brent crude, the global benchmark, moving above $90 a barrel. That increase came as tensions grew around the conflict in the Middle East and as talks continued over reopening the Strait of Hormuz, a key waterway for global oil supply and trade. The article says the strait has been largely closed for almost six months because of the US-Israel war with Iran, contributing to supply disruption and higher prices.

Higher oil prices can feed through the economy in several ways, raising transport and production costs and adding to inflationary pressure. That matters because central banks may respond to renewed inflation by keeping interest rates higher for longer, or by raising them further if price pressures intensify. For governments already carrying high debt levels, higher yields also make it more expensive to refinance borrowing.

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The market move is also being linked to uncertainty over the scale of investment in artificial intelligence and how long it may take for those spending plans to pay off. John Canavan, lead analyst at Oxford Economics, said inflation risk from higher oil prices, high government debt and uncertainty around AI spending were all contributing to the rise in borrowing costs. He said the effect could be felt in higher mortgage rates and more expensive borrowing for car loans, while companies could face higher financing costs that may be passed on to customers.

What happens next will depend on whether oil prices remain elevated and whether tensions around the Strait of Hormuz ease. Investors will also be watching for any further moves in bond markets in the US, UK, Germany and Japan, as well as signals from central banks about the outlook for inflation and interest rates. For now, the main uncertainty is whether this is a short-lived market reaction or the start of a broader and more persistent rise in global borrowing costs.

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