Global Bond Yields Are Defying the Fed as Inflation Risk Returns

The Federal Reserve is keeping its policy rate at 3.50%–3.75%, but long-term government borrowing costs are moving higher across major markets.

The U.S. 30-year Treasury yield reached 5.327% on August 18, its highest level since 2007, while the 10-year moved to about 4.74%.

Japan’s benchmark 10-year government bond yield reached a 30-year high, and German and French yields also climbed to multi-year highs.

The move comes as U.S. inflation continues to ease. Headline CPI slowed to 3.4% in July from 3.5% in June, while core inflation fell to 2.5%. Those readings have reduced expectations for another near-term Fed increase.

Brent crude, however, remains above $90 as disruption around the Strait of Hormuz keeps energy costs elevated.

Heavy government borrowing and new long-dated bond issuance are adding further pressure to yields.

The result is a global bond market where long-term financing costs are rising even without a new round of central-bank rate increases.

Global Bond Yields Rise as Oil Stays Above $90

Brent has moved above $90 as disruption around the Strait of Hormuz continues. Nearly 20 million barrels of oil a day normally pass through the route, and the IEA has described the 2026 disruption as the largest oil-supply disruption in modern market history.

Alternative export routes can handle only a fraction of normal Hormuz flows. That leaves global energy markets exposed to higher transport costs, rerouted cargoes and tighter supply if disruption persists.

Long-dated government bonds have come under renewed selling pressure as investors price in the risk that higher energy costs keep inflation elevated for longer.

The move is most visible at the long end of the curve, where investors are demanding more compensation to hold debt over 10, 20 and 30 years.

Oil is therefore adding a second layer of pressure to bond markets already dealing with heavy government borrowing and large new debt issuance.

Softer U.S. Inflation Is Keeping the Fed on Hold

Headline CPI slowed to 3.4% in July from 3.5% in June, while core inflation fell to 2.5% from 2.6%. Energy prices remained above year-earlier levels, but the broader inflation readings did not show a fresh acceleration.

The Federal Reserve kept its policy range at 3.50%–3.75%. It said inflation remained above its 2% objective, while economic activity continued to expand and business investment stayed firm.

Employment data has also softened, reducing pressure for another immediate rate increase.

Markets have cut expectations for a September hike as investors wait for clearer evidence that higher energy costs are feeding into consumer prices.

The Fed is leaving short-term rates unchanged as higher long-term borrowing costs tighten financial conditions through the bond market.

Capital Is Moving Into New Energy and Infrastructure Supply

Oil output outside the Gulf has recovered part of the volume lost through Hormuz, but Gulf shipments remain below pre-conflict levels.

The IEA says producers in other markets have increased supply, while work on alternative export routes continues.

Capital is also moving into infrastructure that could add capacity outside existing bottlenecks.

AI companies are raising debt for data centres, power generation and chip infrastructure, and Reuters says AI-related debt is approaching 15% of investment-grade issuance this year. Major hyperscalers have issued large volumes of bonds to finance new capacity.

That borrowing is taking place alongside investment in refining, power and transport infrastructure.

The projects do not remove the current energy constraint, but they show where long-term capital is being committed as companies build around higher demand and supply disruption.

The IMF still projects global growth of 3.0% in 2026 and 3.4% in 2027. It expects global inflation to ease in 2027, leaving current infrastructure spending as one of the areas carrying investment through a period of higher financing costs.

Central Banks Are Watching What Higher Market Rates Do Next

Higher global bond yields are already raising the cost of long-term funding for governments and companies across major markets.

Central banks will now be watching whether that rise in market rates starts to cool credit demand, business investment and household spending before inflation moves higher again.

Wage growth and the next inflation readings will matter more if energy prices remain elevated.

The IMF still expects global inflation to ease in 2027, but that outlook now depends partly on how much restraint comes from the bond market itself.

The next round of monetary-policy decisions will be made with tighter financing conditions already in place and global capital facing a higher cost of staying invested for the long term.