The calm before the storm? GBP volatility approaches record lows: Budget announcement imminent, Wells Fargo warns of severe hedging shortfall

According to Zhitong Finance APP, an unusual calm is currently pervading the British pound options market—a development that seasoned traders know is often not good news. The one-month implied volatility for the pound against the euro is hovering near last week's record low, while the two-month implied volatility remains close to its August low—even though the latter now increasingly covers the period when the UK government is set to announce its fiscal plans. In other words, the market appears calm on the surface, but a major catalyst is approaching.

Where does the calm come from?

This calm largely reflects the broader market context. Recent moves in exchange rates have been dominated by the US dollar, oil prices, and global rates, relegating the relative moves between the UK and the eurozone to a secondary role in the FX pricing hierarchy.

But this division of influence is only temporary. The upcoming UK budget will provide a clear catalyst, and the divergence in policy expectations between the Bank of England and European Central Bank could soon reclaim its influence over the pound's direction.

On October 28, the UK's new Chancellor of the Exchequer John Healey will unveil his first budget—this will also be the first comprehensive fiscal plan since Andy Burnham took over as Prime Minister in July. The two-month implied volatility pricing window coincides precisely with this event, yet the options market is hardly pricing in a premium for it.

Wells Fargo: Investors are under-hedged

"Judging by current implied volatility levels, investor hedges for the budget may be far from adequate," wrote Wells Fargo strategists Erik Nelson and Marcus Jennings in a recent note.

The bank recommends going long the euro and shorting the pound, targeting 0.8650, and noting that positions are more neutral now than ahead of the previous budget—meaning that if there are surprises in the budget, under-hedged investors will be directly exposed to the shock.

The strategists also point to another layer of risk: the current low-volatility environment supports the carry trade, and the high-yielding pound is a direct beneficiary of this strategy. The Bank of England's base rate is currently 3.75%, 125 basis points higher than the ECB's 2.50% deposit rate. This spread is the direct return for holding the pound over the euro and has been a key factor supporting the pound this year. However, should volatility return from these lows, unwinding carry trades built on this "calm" would itself become a source of selling pressure on the pound.

Asymmetry in rate hike expectations: the pound’s greatest vulnerability

According to Wells Fargo, monetary policy pricing is another source of potential asymmetric risk. Currently, markets are pricing in greater tightening from the Bank of England than from the European Central Bank—leaving the pound especially vulnerable if these expectations prove overly aggressive.

There is also a fiscal dimension to the pound’s situation. The UK’s 30-year gilt yield is currently around 5.9%, a high not seen since the 1990s, and fiscal sustainability has become the key criterion for overseas investors assessing UK assets. In response, the Bank of England is considering halting the sale of long-dated gilts and slowing the pace of quantitative tightening to ease pressure on the bond market. This means the October 28 budget is not just a list of taxes and spending, but a test of fiscal credibility—if Chancellor Healey’s plan fails to reassure the market, both gilts and the pound could come under pressure, and the return of volatility from record lows would not be gentle.

The latest swap market pricing shows traders have now fully priced in five 25-basis-point rate hikes by the Bank of England by the end of 2027, taking the base rate to 5%. For the European Central Bank, four hikes are priced in over the next twelve months. Inflation concerns fueled by soaring energy prices are driving these bets—after a key Saudi pipeline was attacked and shut down, Brent crude briefly topped $109 per barrel on Monday, and the UK’s two-year gilt yield jumped 16 basis points to 4.97% that day.

But the data do not fully support a hawkish stance. UK CPI for July rose to 2.9% year-on-year, but this was driven by an increase in the energy price cap; core CPI remained unchanged at 2.6%, and services inflation actually fell from 3.6% to 3.4%. Wage growth ex-bonuses for the past three months was 3.5%, and the unemployment rate was 4.9%.

"While higher energy prices have tilted risks in a more hawkish direction, the market is now pricing in nearly five additional hikes over the coming year—this degree of tightening is still hard to reconcile with weak wage growth and softening labor market indicators," said Jefferies economist Modupe Adegbembo. She expects the Bank of England to hold rates steady at this week’s meeting and throughout 2027.

This Thursday's rate decision will thus be the first key test: if the Bank of England stands pat or adopts dovish language, the market’s aggressively priced hiking path may begin to unwind, eroding the pound’s carry support; meanwhile, at the same time, the European Central Bank just hiked rates by 25 basis points on September 10, and further hikes are expected—the interest rate differential between the UK and eurozone stands at a crossroads of two-way risk.

Euro call options remain in demand, but conviction is weakening

As of press time, the euro was trading at 0.8559 to the pound, having earlier fallen to 0.8611 on Monday—a more than two-month low. Options pricing shows traders still see upside potential for the euro against the pound over the next two months, but bullish conviction is now weaker than the year-to-date average.

On one side is record-low implied volatility; on the other is an approaching budget, diverging central bank expectations, and crowded carry trades—the market’s calm seems more like closing one’s eyes before the storm, rather than the storm having actually passed.