Interest Rate Cycles and Your Investment Portfolio

Few forces shape investment markets as powerfully as interest rates. They determine the cost of capital, the discount rate applied to future earnings, the attractiveness of bonds versus equities, and the monthly repayment on every leveraged asset from mortgages to private equity buyouts. For internationally mobile investors, understanding where you are in the rate cycle — and how different asset classes typically respond — is foundational knowledge.

How the rate cycle works

Central banks — the Bank of England, the US Federal Reserve, the European Central Bank — set short-term interest rates, specifically the overnight rate at which commercial banks lend to each other. This rate ripples through the economy: it influences savings rates, mortgage rates, corporate borrowing costs, and the yield on short-term government bonds.

Long-term interest rates, however, are set by the market. The yield on a 10-year gilt or US Treasury reflects the market's collective view of expected short-term rates over that decade, plus a term premium for the uncertainty of holding a long bond. When markets expect rates to remain high for an extended period, long yields rise. When rate cuts are anticipated, long yields fall — even before central banks act.

The relationship between short and long rates is depicted by the yield curve. In a normal (positively sloped) yield curve, long rates exceed short rates — investors demand a premium for locking money away for longer. When short rates exceed long rates, the yield curve "inverts." An inverted yield curve has historically preceded recessions in the US with remarkable consistency, and it did so again in 2022–2023.

The 2021–2023 hiking cycle: the fastest in four decades

The inflation shock of 2021–2022 — triggered by post-pandemic supply disruptions, fiscal stimulus, and then the energy shock of the Russia-Ukraine war — forced central banks into the most aggressive hiking cycle since the early 1980s.

In the UK, the Bank of England raised rates from 0.1% in December 2021 to 5.25% by August 2023: 14 consecutive increases in 18 months. The Federal Reserve was similarly aggressive, moving from 0–0.25% to 5.25–5.50% in just over a year. The ECB, despite longer initial hesitation, followed with its own rapid hiking sequence.

The consequences for investment portfolios were severe:

Bonds experienced their worst year in over 200 years. The Bloomberg Global Aggregate Bond Index fell approximately 16% in 2022 in sterling terms. Long-dated gilts fell 30–40%. Investors who held bonds as "safe" portfolio ballast were shocked to discover how catastrophic duration risk can be in a rising-rate environment.

Equities fell sharply, with rate-sensitive sectors hardest hit. Growth stocks — technology companies, loss-making disruptors — whose valuations rest heavily on discounted future cash flows, fell 30–60% in many cases. The higher the discount rate, the less a distant future profit is worth today. The NASDAQ fell 33% in 2022.

Cash and short-term savings became attractive for the first time in a decade. UK savings rates rose from near-zero to 5%+. Money market funds, NS&I fixed-rate bonds, and short-term gilts all became competitive yield sources.

Property prices adjusted. UK house prices peaked in mid-2022 and fell 5–10% nationally as mortgage rates soared. Leveraged commercial real estate portfolios came under acute stress as refinancing became dramatically more expensive.

The cutting cycle: 2024 onwards

Having brought inflation down from peaks above 10% (UK CPI) toward the 2% target, central banks began cutting rates in 2024. The Bank of England cut from 5.25% toward 4% and below across 2024–2025. The Fed and ECB followed parallel paths, though with different timings.

The investment implications of a cutting cycle are the mirror image of hiking:

Bonds regain value. When rates fall, the price of existing bonds rises — because the fixed coupon they pay becomes more attractive relative to new bonds issued at lower rates. The longer the maturity (and therefore the duration) of the bond, the more its price rises for a given rate cut.

Duration extension becomes the strategic move. At or near peak rates, buying long-dated gilts or Treasuries locks in the high yield AND positions the portfolio for capital gains as rates fall. Investors who bought 30-year gilts at their October 2022 peak yields captured substantial capital gains as rates declined.

Rate-sensitive equities recover. Technology growth stocks, property companies (REITs), and infrastructure funds — all of which were crushed in 2022 — tend to re-rate positively as discount rates fall.

Cash yields compress. The advantage of sitting in cash or money market funds erodes as the base rate falls. Investors holding large cash positions face the reinvestment challenge: what do they do with money that was earning 5% but will soon earn 3%?

Understanding duration: the key metric for bond investors

Duration is the bond investor's primary tool for expressing a rate view. 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. A short-duration bond (2–3 years) has much less price sensitivity.

At the peak of a hiking cycle, reducing duration — holding short-dated bonds, floating rate notes, and cash — protects the portfolio from further rate rises. As rates peak and begin to fall, extending duration — moving to longer-dated bonds — positions the portfolio for capital appreciation.

Inflation-linked bonds (UK: index-linked gilts; US: TIPS) add a further dimension. They protect against inflation eroding the real value of fixed income, though they still carry duration risk and fell sharply in 2022 along with conventional gilts.

The "higher for longer" debate

The central uncertainty in 2025 and beyond is whether interest rates will settle structurally higher than the 2010s, or revert to the near-zero environment of that era.

The "higher for longer" case rests on: persistent services inflation; the de-globalisation trend (supply chains becoming less efficient as geopolitical fragmentation increases costs); the fiscal deficit (governments borrowing heavily add to bond supply, keeping yields elevated); and the reversal of the demographic trend that suppressed rates in the 2000s–2010s (ageing populations saving less as they draw down assets).

The "rates return to low" case argues: the 2021–2022 inflation was a one-off supply shock that has passed; technology-driven productivity deflation will reassert; ageing populations in developed markets continue to favour bonds (demand for fixed income); and central banks' 2% targets remain credible.

The implications for portfolio construction differ substantially. If rates settle at 4%+, long-duration bonds look unattractive on a hold-to-maturity basis; equities — particularly growth stocks — face a permanently higher discount rate; and property values remain structurally lower than in the zero-rate era. If rates return to 1–2%, long bonds are an exceptional opportunity and growth equities will re-rate dramatically.

Most prudent investors avoid making a single confident bet on either outcome and instead construct a portfolio that is robust across the range of scenarios.

Practical positioning at each stage of the cycle

Early hiking cycle (rates rising from low levels): reduce bond duration; favour floating rate notes and short-dated bonds; hold cash; avoid highly leveraged assets (PE, property); hold energy and financials (banks benefit from higher net interest margins).

Peak rates (rates at or near the top): begin extending duration — buy 10-year gilts and Treasuries to lock in high yields; start re-entering quality long-duration equities; maintain some cash as a hedge against further surprises.

Early cutting cycle (rates starting to fall): extend duration further — long bonds appreciate most; re-enter REITs and infrastructure; rotate from value toward growth in equities; the carry trade becomes interesting (borrowing in lower-rate currencies, investing in higher-rate currencies) — though this strategy reverses sharply when rate differentials narrow.

Low rate environment (rates at trough): return to risk assets; equities and alternative income (private credit, infrastructure, property) offer better returns than bonds or cash; the core challenge is avoiding yield-chasing into illiquid or low-quality assets.

The carry trade: opportunity and risk

The carry trade — borrowing in a low-interest-rate currency and investing in a higher-yielding currency or asset — is a classic macro strategy amplified by rate cycles. In the 2010s, Japanese yen borrowing funded positions in higher-yielding currencies. In 2024–2025, the collapse of the yen carry trade as Japanese rates rose caused significant volatility across global markets.

For individual investors, the carry trade manifests in simpler ways: holding unhedged overseas bonds (picking up yield) or using interest-rate differentials to assess currency hedging costs. An investor buying US Treasuries from the UK faces a hedging cost equal to the US-UK rate differential — when US rates are higher, hedging is expensive and may eliminate the yield advantage.

Compliance note

This guide is for informational purposes only and does not constitute personal financial or investment advice. Interest rate forecasting is inherently uncertain, and investments can fall in value as well as rise. Past relationships between rate cycles and asset class performance may not repeat. Rules and market conditions change; always seek independent professional advice before making investment decisions.

How Global Investments can help

Global Investments actively monitors the interest rate environment across the international markets in which we work. Our portfolio construction process explicitly considers rate cycle positioning — from duration management in fixed income to sector tilts in equities and financing cost assessment in real estate. Whether you are reviewing a bond portfolio built for a different rate environment, or seeking to reposition assets as the cycle evolves, our advisers provide the analysis and implementation support to act decisively. Contact us to discuss how current rate dynamics affect your specific portfolio.