GBP/CHF reaches 1.1100 by the Bank of England’s November 5, 2026 decision in the base case, 1.1250 in the bull case and 1.0820 in the bear case, because a Monetary Policy Committee with three members already voting to hike is being priced against a Swiss National Bank that has just pencilled in a 0% policy rate for its entire forecast horizon.

The Pound Sterling to Swiss franc cross (GBP/CHF) closed Friday, September 25, 2026 at 1.0974, up 0.36% on the day (CNBC, September 25 close). The base case rests on a 375-basis-point policy-rate gap, Bank Rate at 3.75% against the SNB policy rate at 0%, which the Bank of England (BoE) came within two votes of widening on September 17. The call fails if any one of four signals fires, listed in the disconfirmation section.

Key Levels:

• GBP/CHF: 1.0974, Friday September 25, 2026 close — FT Markets daily series
• Base case target: 1.1100 by November 5, 2026 — about one standard deviation above spot on 4.7% three-month realised volatility
• Bull case target: 1.1250 — triggered if the November MPC actually raises Bank Rate to 4%
• Bear case target: 1.0820 — a durable Middle East ceasefire pulls Brent below $90/bbl and UK hike pricing with it
• Major support: 1.0889 — September 4 swing low, retested at 1.0893 on September 24 (FT)
• Major resistance: 1.1066 — September 17 intraday high and 52-week high (FT Markets)
• Invalidation level: weekly close below 1.0880 — beneath both September lows

Methodology: what this call is built on

Prices come from the Financial Times daily GBP/CHF series, cross-checked against CNBC; both show a 1.0974 close for Friday, September 25, 2026, labelled as Friday’s close because markets are shut. Moving averages and realised volatility use 285 daily closes from August 25, 2025 to September 25, 2026. Policy settings, votes and quotes come from the primary documents: the BoE September 2026 Monetary Policy Summary and minutes and the SNB monetary policy assessment of September 24, 2026. Two-year and 10-year yields are CNBC closes. Speculative positioning is the Commodity Futures Trading Commission (CFTC) legacy Commitments of Traders (COT) report dated September 22. Caveat: over six weeks, one energy headline can move the cross more than any rate differential.

The data: a 375bp policy gap and a franc the SNB is happy to see weaker

UK Consumer Price Index (CPI) inflation was 3.1% in August, according to the BoE minutes, enough to trigger an open letter from Governor Andrew Bailey to the Chancellor. Swiss inflation was 0.8%, per the SNB. The UK has a positive real policy rate; Switzerland has a negative one.

Variable	United Kingdom	Switzerland	Gap
Policy rate	3.75% (Sept 17)	0% (Sept 24)	375bp
CPI inflation, August	3.1%	0.8%	2.3pp
Real policy rate	+0.65%	-0.80%	145bp
2-year government yield	4.82%	0.36%	446bp
10-year government yield	5.35%	0.65%	470bp
CFTC non-commercial net, Sept 22	-82,568 contracts	-26,752 contracts	Both net short

Sources: BoE Monetary Policy Summary and minutes, September 17, 2026; SNB monetary policy assessment, September 24, 2026; CNBC yield closes, September 25, 2026; CFTC legacy COT, week to September 22, 2026. Real rate = policy rate minus August CPI.

What is the GBP/CHF rate differential? It is the gap between what sterling and franc deposits pay, and on September 25, 2026 it stood at 446 basis points on two-year government paper: 4.82% on the two-year gilt against 0.36% on the two-year Swiss Confederation bond, according to CNBC closing data. The policy-rate gap underneath is 375 basis points, Bank Rate at 3.75% against the SNB policy rate at 0%. In late August the two-year spread was nearer 427 basis points, with the gilt around 4.32% and the Swiss note around 0.05%, so it has widened by roughly 19 basis points in a month even though Swiss yields also rose. A wider spread raises the cost of holding francs instead of pounds, and that carry is the main support for GBP/CHF above its 200-day moving average at 1.0693. The spread matters most when volatility is low, and one-month realised volatility on the cross was just 3.5% annualised at Friday’s close.

Price has followed the spread. GBP/CHF is up 2.74% since the end of 2025, when it closed at 1.0681, and the SNB says the franc has lost about 3% on a trade-weighted basis since June.

“A 25-basis point increase in Bank Rate now sends a clear signal of the MPC’s commitment to achieving its price stability mandate amidst the fog of geopolitical conflict and data noise.”

— Huw Pill, Chief Economist and MPC member, Bank of England (MPC minutes, September 17, 2026)

The mechanism: why three dissenters matter more than six holders

Megan Greene, Catherine L Mann and Huw Pill voted to raise Bank Rate to 4%. Their case, set out in the minutes, is that inflation will peak in early 2027 “just as wage settlements were agreed”, while labour-market slack “appeared to have peaked already”. Mann wrote that the BoE’s short-term forecast “projects CPI reaching somewhat over 4% early next year”.

Why does a split Bank of England vote move GBP/CHF? A split vote tells the market how close the committee is to changing direction, and a 6–3 hold with all three dissenters on the hawkish side means only two more votes are needed for a hike. The minutes also show that two of the six holders, Swati Dhingra and Alan Taylor, “placed particular weight on the role of slack”, so the other four are the swing bloc. The minutes record that the UK short-rate curve was already “peaking at around 4.9% by end-2027” and that the “perceived probability of near-term increases in Bank Rate had risen”. On the Swiss side, the SNB’s conditional inflation forecast of 0.7% for 2026 and 0.8% for 2027 and 2028 assumes the policy rate stays at 0% for the whole horizon. So one central bank is debating a hike and the other has written down no change at all, and that difference supports the pound against the franc.

The SNB is not resisting. “This depreciation was in line with the widening of interest rate differentials between the major currency areas and Switzerland,” Chairman Martin Schlegel said on September 24 (SNB introductory remarks). With inflation at 0.8%, it has little reason to fight a weaker franc.

The strongest argument against the call is that much of this is already priced. The two-year gilt at 4.82% is already more than a full point above Bank Rate. On September 17, the day of the hawkish split, GBP/CHF hit its 52-week high of 1.1066 and then closed at 1.1016, below the prior day’s 1.1047. Hawkish news has not produced a sustained break higher.

What the model misses

A rate-differential model assumes investors want carry. The franc is a safe haven, and this energy shock comes from war in the Middle East. If the conflict spreads and risk assets sell off hard, franc demand can outweigh any spread, so the Brent price that pushes the BoE toward a hike also raises the odds of a risk-off move that helps the franc.

Positioning is the second blind spot. Speculators were net short sterling by 82,568 contracts in the week to September 22, up from 44,524 on August 25 (CFTC). A crowded short can squeeze higher on a hawkish surprise, or it can mean funds expect UK stagflation to hurt the pound more than higher rates help it.

Third, the Swiss two-year yield has risen from near zero to 0.36% since late August. If markets start pricing an SNB hike at the December 10 assessment, the spread could narrow even with the BoE on hold.

“Monetary policy is already firmly restrictive: Bank Rate remains materially above my estimate of neutral at 3%, while an elevated curve bears down via mortgage and other lending rates.”

— Alan Taylor, External MPC member, Bank of England (MPC minutes, September 17, 2026)

What would invalidate this call

The base case to 1.1100 breaks if ANY ONE of these four signals fires:

• GBP/CHF weekly close below 1.0880. That breaks both September lows (1.0889 and 1.0893) and the 50-day average, and would mean the carry bid has failed.
• UK September CPI, due October 21, prints at or below 2.8%. A fall of 0.3 points or more from August’s 3.1% would undercut the hawks’ early-2027 inflation-peak argument and take a hike off the table.
• The SNB signals a policy-rate increase, or the Swiss two-year yield rises above 0.60%. Either would mean the franc side of the spread is narrowing faster than the sterling side is widening.
• Brent settles below $90/bbl for a full week. Brent’s front-month contract was near $104 at Friday’s close (ICE, via CNBC). A drop of that size removes the energy argument all three hawks relied on.

What to watch next: dates and levels into November 5

The Office for National Statistics (ONS) publishes UK September CPI on October 21, 2026, the last inflation print before the MPC. The BoE’s next decision and Monetary Policy Report is due on November 5, 2026. The SNB does not meet again until December 10, after this call’s timeframe. Weekly CFTC reports will show whether the sterling short is being covered. On the chart, a daily close above 1.1066 would clear the 52-week high and leave 1.1100 as the next round-number level. Below spot, 1.0942 (the 50-day average) is the first test.

FAQ

What did the Bank of England decide in September 2026?

The Monetary Policy Committee voted 6–3 on September 17, 2026 to keep Bank Rate at 3.75%. Megan Greene, Catherine L Mann and Huw Pill voted for a 0.25-point rise to 4%. It also voted unanimously for a multi-year plan to run its gilt holdings down to zero, including £20 billion of annual sales. The next decision is due on November 5, 2026.

What did the Swiss National Bank decide in September 2026?

The SNB left its policy rate at 0% on September 24, 2026 and kept the 0.25-point discount on sight deposits above the exemption threshold. Its conditional inflation forecast puts Swiss inflation at 0.7% in 2026 and 0.8% in both 2027 and 2028, assuming the rate stays at 0%. It said it remains willing to intervene in the foreign exchange market.

Why is the Swiss franc weakening in 2026?

Mainly because of interest rates. The SNB said the franc fell about 3% on a trade-weighted basis between June and September, which Chairman Martin Schlegel linked to wider rate differentials with the major currency areas. The ECB and US Federal Reserve have both raised rates, the BoE is split over a hike, and the SNB has stayed at 0%, which makes holding francs relatively expensive.

What is the invalidation level for this GBP/CHF call?

A weekly close below 1.0880. That level sits under the September 4 low of 1.0889, the September 24 low of 1.0893 and the 50-day moving average of 1.0942. A close beneath all three would mean the rate-differential support has failed. The call also fails if UK September CPI comes in at or below 2.8%, if the SNB signals a hike, or if Brent stays below $90/bbl for a week.

Related Industry Spread analysis: GBP/USD to 1.3150 by the November MPC: the gilt-supply case, USD/CHF to 0.7950: the SNB reaction-function case and EUR/CHF to 0.9450: the franc-cap credibility test.

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