Sterling Is Quietly Repricing Your UK Equity Returns

UK investors tend to review performance in sterling. That is the right base currency for most liabilities, but it can obscure a powerful force. A portfolio can rise because the companies inside it have done well. It can also rise because the pound has fallen. In 2026, with sterling sensitive to rate expectations and gilt yields, the distinction matters more than usual.

The translation effect is not a stock tip

Start with a simple example. A FTSE 100 company earns most of its revenue in US dollars and euros. Its accounts are published in sterling. If the pound weakens, those overseas profits translate into more sterling. The underlying business has not changed. The share price may still move. For a UK investor, the return improves. The reverse happens when sterling strengthens.

This is not confined to the largest companies. A FTSE 250 industrial may report in sterling but buy components in euros or sell into North America. A domestic-facing retailer may have no overseas revenue but import goods priced in dollars. Currency exposure sits in revenue, costs, debt and hedging contracts. The listing venue tells you very little on its own.

Where the hidden exposure sits

The first place to look is the annual report. Most companies disclose revenue by geography. Fewer disclose costs by currency, which is where the offset often sits. A company with dollar revenue and dollar costs has less net exposure than the revenue split implies. A company with dollar revenue and sterling costs has more.

Debt matters too. Borrowing in foreign currency can create a natural hedge if revenues are in the same currency. It can also amplify losses if the pound moves the wrong way. Hedging disclosures are worth reading. Some companies hedge the next twelve months of cash flow. Others hedge balance-sheet exposure only. The policy changes the timing of currency effects, not their existence.

For funds, check the share class. An unhedged global equity fund held by a UK investor carries currency exposure by default. A hedged share class reduces it, but hedging has a cost and can fail to track perfectly. The factsheet should state the base currency and the hedging policy. If it does not, ask.

Why a weak pound can flatter a rally

When sterling falls, large overseas earners often lead the UK index. That can look like a rotation into quality. Sometimes it is. But part of the gain is translation. If the index is measured in sterling, and a large share of its earnings is in dollars, a weaker pound mechanically raises the sterling value of those earnings.

The test is straightforward. Compare the portfolio with a benchmark in the same currency. Then compare it with a currency-hedged version of the benchmark. If most of the outperformance disappears when currency is stripped out, the result was largely currency beta. That is not a criticism. Currency exposure can be deliberate, and it can diversify a sterling-based investor. But it should be understood.

Attribution helps. A good report will separate currency contribution from stock selection and sector allocation. If it does not, ask for it. Over short periods, currency can dominate. Over longer periods, business performance usually matters more, but currency still shapes the path.

A checklist before calling it skill

• Benchmark in the same currency. A sterling return compared with a dollar index is not a like-for-like comparison.
• Compare hedged and unhedged share classes. The gap is a rough guide to currency effect, after costs.
• Read the geographic revenue split and, if available, the cost split. Revenue alone can overstate exposure.
• Check company hedging policy. Short-term hedges can delay, not remove, the impact.
• Review the period. Currency moves can reverse. A three-month record is not evidence of process.
• Separate currency from stock selection. If your fund manager does not, do it yourself.
• Consider your liabilities. If your spending is in sterling, unhedged overseas exposure adds volatility to your planning.

What this means for UK portfolios

Currency is not a reason to abandon overseas diversification. Nor is it a reason to hedge everything. It is a variable that should be recognised, measured and, where appropriate, managed. The danger is treating a sterling-driven gain as proof of stock-picking skill. That can lead to overconfidence, larger positions and disappointment when the currency turns.

In 2026, with sterling responsive to interest-rate expectations, investors should expect the translation effect to remain visible. The sensible response is not to forecast the pound. It is to know how much of your return depends on it. That is a question of measurement, not prediction.