Bond Investing — A Practical Guide for Private Investors

Bonds are the second leg of the classic diversified portfolio. For decades they played a reliable supporting role — providing income, capital stability, and (in most environments) a negative correlation to equities that smoothed overall portfolio returns. The events of 2022 — when both equities and bonds fell sharply simultaneously — prompted a re-examination of that role. But even after that shock, understanding how bonds work remains essential knowledge for any investor.

This guide explains the mechanics of bonds clearly, examines the key concepts that drive bond returns, and provides practical guidance on how UK private investors access the bond market.

What is a bond?

A bond is a loan made by the investor to the issuer. The borrower — typically a government or a large company — agrees to:

1. Pay interest (the coupon) at regular intervals (usually semi-annually or annually) for the life of the bond.
2. Repay the face value (principal, or "par value") at the end of the agreed term (maturity).

A simple example: a UK government bond (gilt) with a 5% coupon and 10-year maturity, face value £1,000, pays £50 per year for 10 years, then returns the original £1,000. If bought at face value and held to maturity, the annual return is 5% — the "yield" equals the coupon.

The issuer does not "earn" any return on your money in the way a company does with equity capital — they simply borrow it and owe it back. This structure gives bonds their characteristic fixed-income nature: in a normal scenario (no default), the cash flows are precisely known from the outset.

The inverse relationship between bond prices and yields

The most important concept in bond investing — and the most frequently misunderstood — is that bond prices and yields move in opposite directions.

Here is why: suppose you hold a bond paying a 3% coupon when new bonds are issued at 5%. Investors can get 5% on a new bond; why would they pay full face value for your 3% bond? They won't. The price of your bond falls until it yields approximately 5% — that is, until the fixed coupon (3% of face value) plus the discount at which the bond trades represents a total return of 5% to a new buyer.

The reverse is equally true. If rates fall from 5% to 3%, a bond paying 5% becomes more attractive than new bonds; buyers push its price up above face value.

This is not a technical quirk — it is a mathematical law of bond investing. Its practical implications:

• When interest rates rise, bond prices fall. This is what devastated bond portfolios in 2022, when the Bank of England raised rates from 0.1% to 5.25%. The price of existing gilts fell sharply.
• When interest rates fall, bond prices rise. The entry into a cutting cycle from 2024 onwards is, in principle, positive for bond prices.

Duration: measuring interest rate sensitivity

Duration is the metric that quantifies how sensitive a bond's price is to changes in interest rates. A bond with a duration of 10 years will, approximately, fall 10% in price for every 1% rise in yields, and rise 10% for every 1% fall.

The duration of a bond is influenced by:

• Maturity: longer-dated bonds have higher duration.
• Coupon rate: a lower coupon means a larger proportion of the bond's value comes from the distant principal repayment, increasing duration.

A 2-year gilt might have a duration of approximately 1.9 years — modest interest rate sensitivity. A 30-year gilt might have a duration of 20+ years — extreme sensitivity. In 2022, investors holding long-dated gilts in their "safe" fixed income allocation experienced drawdowns of 30–40%.

For investors managing bond exposure, duration is the primary tool: short duration in a rising rate environment, longer duration when rates are expected to fall.

Types of bonds

Government bonds: issued by national governments; considered the safest bonds available in their domestic currency (a government can, in extremis, print money to service domestic currency debt). In the UK: gilts. In the US: Treasuries. In Germany: Bunds. Yields on government bonds are lower than corporate bonds because the default risk is lower.

Investment grade corporate bonds: issued by large, financially sound companies; rated BBB- or above by S&P or Fitch (Baa3 or above by Moody's). Higher yields than government bonds, reflecting the additional credit risk. Examples: BP, Vodafone, Tesco corporate bonds.

High-yield (sub-investment grade) bonds: also called "junk bonds." Issued by companies with lower credit ratings (BB+ or below). Yields are significantly higher — 6–9%+ — reflecting meaningfully elevated default risk. More correlated to equities in a crisis than investment-grade bonds.

Inflation-linked bonds: in the UK, these are "index-linked gilts"; in the US, Treasury Inflation-Protected Securities (TIPS). The coupon and the principal are adjusted in line with inflation (UK: RPI; US: CPI), so the real value (after inflation) of the income stream is preserved. They fell sharply in 2022 alongside conventional gilts because of their high duration, despite the inflationary environment — a salutary lesson in how duration risk can overwhelm inflation protection in the short term.

Callable bonds: the issuer has the right to repay the bond before maturity. This limits the price upside for the investor (since the issuer will call the bond when it is advantageous to do so) and creates reinvestment risk.

Green bonds: bonds where proceeds are earmarked for environmental purposes. The bondholder receives the same financial terms as a conventional bond; the premium is reputational and mission-alignment (and some evidence of lower financing costs for issuers).

UK retail access to bonds

Most UK private investors access bonds via UCITS bond funds — either ETFs or unit trusts — rather than by buying individual bonds directly. This is sensible for several reasons: minimum deal sizes for individual bonds can be £10,000–£100,000; the secondary market for corporate bonds is less liquid than equities; and diversification across a single bond position is very limited.

Bond ETFs: iShares Core UK Gilts UCITS ETF; iShares USD Treasury Bond ETF; Vanguard UK Government Bond Index Fund. These provide liquid, low-cost access to diversified government or corporate bond portfolios.

Bond unit trusts / OEICs: actively managed funds such as M&G Optimal Income, Artemis Corporate Bond, or Royal London Short Duration Credit Fund; the manager selects individual bonds based on credit analysis and duration management.

Individual gilts via platforms: Hargreaves Lansdown, AJ Bell, and Interactive Investor all allow direct purchase of individual UK government gilts. This can be attractive for investors who want the certainty of a known maturity date and yield to maturity — particularly for those managing a specific liability (e.g., a known capital requirement in five years' time).

NS&I (National Savings and Investments): the UK government's retail savings arm offers guaranteed savings certificates and fixed-rate bonds that are, in effect, government bonds in retail-friendly format. They carry an implicit government guarantee beyond the FSCS limit.

The role of bonds in a portfolio: a reassessment

The traditional role of bonds in a diversified portfolio rests on two pillars: income generation and negative correlation to equities in a crisis (bonds rally when equities fall). The second pillar was severely tested in 2022.

The reason bonds and equities both fell in 2022 was inflation. When inflation is the primary driver of market stress, central banks raise rates to combat it — and rising rates are bad for both long-duration bonds (mechanically) and for equities (via the discount rate effect). The traditional negative correlation of bonds and equities assumes that the market shock is a recession or growth scare, which typically leads to rate cuts (good for bonds) while equities fall.

For long-term investors, this does not eliminate bonds from the portfolio. It does mean:

1. Duration management matters more than previously appreciated.
2. The "safe" narrative of long-dated bonds needs qualification.
3. Short-dated bonds and inflation-linked bonds may provide better downside protection in some inflation scenarios than long-dated conventional bonds.

In the current environment (mid-2026, with rates having fallen from their peak but remaining materially higher than the 2010s), bonds offer genuinely attractive yields — 4–5% on gilts, 5–6% on investment-grade corporate bonds — without requiring an optimistic growth or credit scenario to deliver reasonable returns.

Compliance note

This guide is for informational purposes only and does not constitute personal financial or investment advice. Bond investments can fall in value as well as rise. Credit risk, interest rate risk, and inflation risk all affect bond values. Yield levels change constantly. Past performance does not guarantee future results. Tax treatment depends on individual circumstances and may change. Always seek qualified independent financial advice before making investment decisions.

How Global Investments can help

Fixed income is a core component of most HNW portfolios, and the complexity of navigating duration risk, credit quality, tax treatment (particularly for internationally mobile clients), and currency exposure is greater than it appears. Our team provides fixed income portfolio review — assessing whether existing bond holdings are appropriately positioned for the current rate environment, the appropriate balance of government and corporate credit, and the tax-efficient structure for your specific circumstances. Contact us to discuss your fixed income strategy.