Pound value hits post-Brexit high against a basket of 18 currencies

What happened. The Bank of England's sterling index reached 86.4 this week, according to the BBC. That is the joint highest level since the June 2016 Brexit referendum. The index is the most-watched measure of the pound against a basket of 18 of the world's main currencies. The Bank will officially confirm the calculation on Thursday.

Against which currency? Against none in particular. The Bank describes its sterling index as a trade-weighted measure: bilateral exchange rates are weighted by trade flows, and the January 2005 average equals 100. In the Bank's narrow version, which uses 2024 trade data, the euro area carries 40.2% and the United States 22.0%. The BBC does not say whether it used the narrow or the broad version. So "post-Brexit high" is true for this basket. It is not a claim about the dollar or the euro alone.

Dollar and euro. Reuters reported sterling at $1.3495 on Wednesday, its highest since September 15, helped by a weaker US dollar after the Democrats won control of both chambers of Congress. That is a seven-week high against the dollar, not a ten-year one. The BBC put the pound at $1.3495 and €1.1979 as of 04:15 GMT on Thursday.

Why now. The BBC says some traders see the UK in a different light given relative political stability, solid growth and the rapprochement with the European Union. Jim O'Neill, an economist and former Treasury minister, said: "People were, and to a lesser extent, are, underestimating the improving momentum in the UK." Markets also expect the Bank of England to raise interest rates on Thursday, the first rise in three years. Higher rates typically boost a currency.

Limits. Reuters quotes Goldman Sachs analysts, who say that pricing of Bank of England hikes looks stretched relative to other G10 currencies and that valuation is a challenge for sterling. Some economists polled by Reuters expect the Bank to temper market bets on three to four increases in 2027. The BBC adds that UK growth has beaten all forecasts this year, but higher energy and fuel prices have hit consumer confidence.

What it means for you. The BBC says a stronger pound can help rein in inflation and increases buying power for consumers on imports and on holidays. If you hold money in another currency, look at your own pair, because the index can rise while one pair does not. That last point is our view.

What we do not know. The final figure the Bank confirms. What the Bank decides on Thursday. Whether the rate rise is already in the price.

Fatos confirmados

• The Bank of England's sterling index, a measure against a basket of 18 of the world's main currencies, reached 86.4 this week, joint highest since the June 2016 Brexit referendum (index where 100 equals the 2005 value).^[2]
• The Bank will officially confirm the calculation on Thursday.^[2]
• The sterling exchange rate index is a trade-weighted measure of sterling; the January 2005 average equals 100.^[1]
• In the Bank's narrow sterling index, based on 2024 trade data, the euro area has a 40.2% weight and the United States 22.0%.^[1]
• Sterling was at $1.3495 at 10:22 GMT on Wednesday (Reuters) and at 04:15 GMT on Thursday (BBC).^[2][3]
• The BBC put the pound at €1.1979 as of 04:15 GMT on Thursday.^[2]
• Reuters said sterling rose to its highest since September 15 on Wednesday, a seven-week high against the dollar.^[3]
• Reuters tied the move to a weaker US dollar after the Democrats won control of both chambers of Congress.^[3]
• A first Bank of England rate rise in three years is widely expected on Thursday.^[2][3]
• Goldman Sachs analysts wrote that Bank of England hike pricing looks stretched relative to G10 peers and that valuation is a challenge for sterling.^[3]
• Some economists polled by Reuters expect the Bank to temper market bets on three to four rate increases in 2027.^[3]
• Some traders say the UK is seen in a different light given relative political stability, solid growth and the rapprochement with the European Union.^[2]
• UK growth this year has beaten all forecasts, but higher energy and fuel prices have hit consumer confidence.^[2]
• A stronger pound can help rein in inflation and increases buying power for consumers on imports and on holidays.^[2]
• Sterling fell significantly after the June 2016 referendum and hit further lows during the Brexit process, the Covid pandemic and the 2022 mini-Budget.^[2]

Implicações

• ConfirmadoThe Bank of England's sterling index is joint highest since the Brexit referendum.
• ConfirmadoAgainst the dollar the pound is at a seven-week high, not a ten-year one.
• ConfirmadoSome analysts think the expected rate rise is already priced in, which limits room for further gains.
• Nossa leituraThe index can rise while a single currency pair does not, so check your own pair. This is our view.

Ainda não se sabe

• The final index figure the Bank of England confirms
• The Bank of England's rate decision on Thursday
• Whether the BBC used the narrow or the broad version of the index
• Whether the rate rise is already in the price

Quem é afetado

United Kingdom, Eurozone, United States, Europe. Anyone who pays or earns in pounds, travels to the UK, trades with it or follows currency markets and interest rates

Fontes

1. Bank of England: Annual reweighting of the sterling exchange rate index 11 de março de 2026 · oficial
2. BBC News: Pound rises to its highest level since the Brexit referendum 4 de novembro de 2026 · mídia
3. Reuters: British pound hits seven-week high against wilting dollar 4 de novembro de 2026 · mídia