Why should I read this? Government bond yields remain close to levels not seen for many years. That puts pressure on some share prices, particularly highly valued growth companies. Yet recent events also support a useful market lesson: the speed and cause of a yield rise often matter more to equities than the yield level on its own.

UK figures are correct at 26 August 2026.

The short answer

Rising bond yields don’t automatically mean falling equity markets.

What matters is how quickly yields rise, why they’re rising and how expensive shares were before the move started. A gradual increase driven by stronger economic growth can sit alongside rising share prices. A sudden jump caused by inflation, heavy government borrowing or doubts about fiscal policy tends to create more difficulty.

Last week’s rapid rise unsettled equity markets. Yields have since fallen back and shares have recovered some ground. The warning hasn’t disappeared, but the immediate pressure has eased.

Who is this article for?

This article is aimed at investors who hold a diversified portfolio of shares and bonds and are wondering whether higher government bond yields require a change.

Anyone holding a large amount in long-dated bonds, highly valued growth shares, property companies or investment trusts should pay particular attention. These investments tend to react more strongly when long-term interest rates change.

UNDERSTAND

Where are bond yields now?

Long-term government bond yields rose sharply during the week ending 21 August, before giving back part of that increase.

The 30-year US Treasury yield briefly reached approximately 5.34% on 18 August, its highest level since 2007. The 10-year Treasury touched almost 4.75%.

Since then, yields have retreated:

US yields are from the 25 August close. The 10-year Treasury fell by almost eight basis points that day, while the 30-year yield fell by nearly seven basis points.

Why are long-term yields so high?

Whenever you get changes in asset prices, it is always easy just to point to one reason, but in reality there are a number of factors.

• Inflation: We have seen this remaining above target, and central banks have taken little action, so bond yields have reacted. If you are considering the real return you receive.
• Government borrowing: Whilst we may think taxes are high, the UK like many countries now are running at a high level of deficit, and this needs to be funded. Increased supply of debt means you need a higher yield to attract buyers.
• Central-bank purchases: Central banks are no longer buying bonds on the scale seen after the financial crisis and during the pandemic.
• Term premium: This is normal, investors want more compensation for lending money over a longer period, when inflation, interest rates and government policy are uncertain.

The Bank of England found that higher real term premiums were the main reason UK long-term yields rose during 2025. It also warned that sudden moves can expose weaknesses elsewhere in the financial system.

Why do higher bond yields affect shares?

A government bond provides an alternative to equities.

If an investor can earn around 5% from a government bond, the extra return expected from shares must look worthwhile. A share priced to deliver 6% or 7% suddenly appears less attractive than it did when government bonds yielded 1%.

Higher yields also change company valuations. Analysts estimate what future profits are worth today by applying a discount rate. When that rate rises, distant profits become less valuable.

Suppose a company is expected to generate £10 of value for shareholders in ten years:

That one percentage point change cuts the present value by almost 9%.

A business earning most of its profits today would normally suffer a smaller valuation effect. This is why technology and other highly valued growth companies can react badly to sudden yield increases.

Property companies, utilities and infrastructure investments can also struggle because they use significant borrowing or have previously been bought as alternatives to bonds.

Why the speed of the rise matters

Markets can adjust to high yields if they have time.

Companies can refinance debt gradually. Analysts can revise forecasts. Pension funds and other large investors can rebalance without having to sell into a falling market.

A sudden move is different. Valuations change across thousands of securities at once, bond prices fall and leveraged investors may face demands for additional security. Some must sell assets regardless of price.

We have included previous examples of changes to bond yields below. The summary is steeper increases in bond yields have generally coincided with larger equity-market falls. But it is the speed of the adjustment which could trigger a correction, particularly when equity valuations already leave little room for disappointing news.

What happened during earlier bond-market shocks?

In the above cases yields rose and impacted markets. But there is a different example, following the 2016 US election, the 10-year Treasury yield rose by about 0.99 percentage points as investors expected stronger economic growth and more government spending. Equity markets continued rising, while volatility and high-yield credit spreads fell.

The cause of a yield rise matters. Higher yields caused by stronger growth may come with higher profit forecasts. Yields driven by inflation, fiscal concerns or a larger term premium bring higher discount rates without the same support for company earnings.

DECIDE

Has the immediate risk now eased?

Yes, to some extent.

The recent episode currently looks more like a market stress spike followed by a partial reversal than the start of an accelerating bond-market crisis.

The US 10-year yield has fallen from almost 4.75% to 4.625%, while the 30-year yield has dropped from approximately 5.34% to 5.162%. UK yields have also moved away from last week’s highs.

Falling oil prices helped. Brent crude dropped below $89 on 25 August and fell further on 26 August as talks raised hopes that shipping through the Strait of Hormuz could resume. Lower oil prices reduce one immediate threat to inflation.

Equity markets responded positively. The MSCI world equity index gained 0.42% on 25 August as Treasury yields and oil prices fell. Global shares edged higher again on 26 August.

Why investors shouldn’t dismiss the risk

The recent fall in yields doesn’t remove the longer-term concerns.

US and UK government borrowing remains high. Investors still want substantial compensation for lending over 20 or 30 years. Inflation risks haven’t disappeared, and long-term yields remain far above the levels seen during most of the decade following the financial crisis.

Equity valuations matter too. Parts of the US market remain priced on the assumption that earnings will grow quickly for many years. Even a modest yield rise can expose weak assumptions when valuations are already demanding.

The current position is therefore more comfortable than it was a week ago, but not comfortable enough to ignore.

Three questions to ask before reacting

1. How fast are yields moving?

A rise of 0.50 percentage points over several weeks carries more immediate risk than the same increase over 12 months.

For now, yields are retreating rather than accelerating.

2. Which yield is moving?

This is really important different parts of the yield curve react to different events.

A higher two-year yield often points towards tighter central-bank policy.

A rising 10-year or 30-year yield, may show that investors want more compensation for inflation, debt supply or uncertainty.

3. So how does this impact the stock market?

Shares can withstand higher discount rates if earnings forecasts rise fast enough.

At the moment, we are seeing yields rise, but companies earnings are also rising.

What can go wrong with the “speed matters” rule?

Speed matters, but it isn’t the only test.

A slow rise can still cause damage if it takes yields far enough to weaken housing, business investment or government finances. A rapid increase may cause only a short correction if the move reverses and company earnings remain healthy.

Starting valuations also matter. An expensive market needs strong profits to justify its price, so even a modest yield rise can expose overoptimistic forecasts.

There is no single yield level at which investors should automatically sell shares.

ACT

What should investors do now?

1. Keep the portfolio decision separate from the headline

A 5% government bond yield doesn’t, by itself, justify selling a diversified equity fund.

2. Check portfolio concentration

Portfolios dominated by US technology, smaller companies, property or long-dated bonds may carry more interest-rate sensitivity than the headline equity percentage suggests.

3. Review bond maturity dates

Higher yields improve the expected return available to new buyers, but long-dated bond prices can fall sharply if yields rise further.

Money needed on a known date should be matched carefully to the bond’s maturity.

4. Rebalance if your allocation has drifted

Selling everything after a market fall locks in the change. A planned rebalance restores the chosen balance between equities, bonds and cash.

5. Watch the combination rather than one number

Rapidly rising long yields, falling profit forecasts, wider corporate credit spreads and weaker liquidity would give a clearer warning than a 5% gilt yield on its own.

CONTINUE

The Clearly Investments view

Bond yields once again offer a genuine source of income, which is good news for investors building the bond part of a portfolio.

The short-term difficulty is that reaching those higher yields can produce losses in existing bonds and unsettle expensive shares.

Last week’s rise was a warning. The subsequent retreat shows that it hasn’t developed into a 2013 or 2022-style yield shock. Oil prices have fallen, bonds have steadied and equities have recovered some ground.

Our view is therefore measured: don’t restructure a long-term portfolio solely because government bond yields are close to 5%.

For short term money, there are opportunities in the bond market, for equities earnings are the counter balance to rising yields and at the moment, they are positive.

Next steps

• Visit the Clearly Investments Markets section for current market explanations.
• Read Gilts are yielding around 5%: has the opportunity returned? before choosing individual government bonds.
• Use the Clearly Investments Risk Assessment to consider whether your portfolio matches your financial capacity and composure.

This article is for educational purposes and isn’t personal financial advice. Investments can fall as well as rise, and you may get back less than you invest.

Reviewed: 26 August 2026