22 August 2026
Executive Summary
A significant global bond-market sell-off is pushing long-term borrowing costs sharply higher.
US 30-year Treasury yields reached approximately 5.34% this week — their highest level since 2007 — while long-term yields have also risen sharply in Europe and Japan.
The US Treasury has responded by increasing purchases of longer-dated government securities, but the initial reduction in yields proved temporary.
The corporate implication is easy to overlook.
A factory does not need to suffer a fire.
A project does not need to lose planning permission.
A company does not need to lose customers.
The financing assumptions underneath the investment can simply stop working.
UK Impact
This matters particularly to UK companies with:
- Refinancing approaching.
- Floating-rate borrowing.
- Property finance.
- Infrastructure projects.
- Leveraged acquisitions.
- Private-credit facilities.
- Construction finance.
- Long-duration capital expenditure.
Long-term sovereign bond yields influence borrowing costs throughout financial markets.
As those benchmark rates rise, companies can encounter:
- Higher refinancing costs.
- Lower debt capacity.
- Tighter interest-cover ratios.
- Reduced valuations.
- More expensive hedging.
- Pressure on covenant headroom.
An investment approved when debt cost 5% may look very different when refinancing is available at 7%.
Global Impact
Reuters identifies several pressures behind the current move, including fiscal concerns, uncertainty over monetary policy and exceptionally heavy corporate borrowing associated with AI infrastructure investment. US government debt has exceeded $40 trillion, while annual interest costs are now above $1 trillion.
The important commercial risk is duration.
Projects such as:
- Renewable energy.
- Infrastructure.
- Commercial property.
- Data centres.
- Manufacturing plants.
often depend upon cash flows extending decades into the future.
Small movements in long-term financing costs can therefore materially alter project economics.
Our View
Businesses should stress-test major investments against refinancing rather than simply operating risk.
Companies should ask:
- When does existing debt mature?
- What interest rate has the business assumed at refinancing?
- What happens if rates are 2% higher?
- Is debt fixed or floating?
- When do interest-rate hedges expire?
- Does higher interest expense threaten covenants?
- Is project viability dependent upon refinancing at today’s rate?
- Could lenders require additional equity?
- Do customer contracts allow prices to adjust?
- Could a refinancing problem arise before the asset itself becomes profitable?
A project can be operationally successful and financially unsuccessful at the same time.
The risk manager therefore needs to understand not simply:
“Can we build it?”
but:
“Can we still afford to own it when the debt rolls over?”
Risk Indicator: ELEVATED
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The information contained within these Market Alerts is provided for general market awareness and informational purposes only. It does not constitute financial, legal, investment, regulatory or insurance advice. Whilst every effort has been made to ensure accuracy at the time of publication using multiple reputable and independently verified sources, geopolitical events, legislation, regulation and market conditions may change rapidly. Readers should obtain appropriate professional advice before acting upon any information contained herein.
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