Markets are buying overnight GBP vol into tomorrow's BoE decision - which we see as a closer to 50/50 chance of cut vs. a hold - and therefore much more finely balanced than the ~7bps of cuts currently priced. Much of the buying interest has been via EURGBP rather than GBPUSD, with the cross a more popular expression for GBP weakness among the sell-side since the summer.
EURGBP markets added close to 3.5 points in overnight vol premium this morning, not far off double the pre-BoE decision average posted over the past two years. This doubles the break-even on an overnight straddle in the cross to +/- 35pips. In contrast, overnight GBPUSD vols have added 3.0 points - well shy of average and bucking the trend of 2025 so far.

We noted yesterday that even beyond the Budget, markets see GBP remaining structurally volatile into 2026 - in excess of all other currencies in G10: For several months, implied vol contracts capturing the November 26th Budget have been trading at a premium relative to the rest of the curve. However, the ratio between implied/realised vol for maturities covering the end of the year and well into 2026 is well elevated relative to G10 peers, suggesting a persistent and sizeable GBP risk premium even beyond Reeves' next fiscal event:

Note: Dark blue line denotes GBP implied/realised vol ratio across all maturities out to two years. Light blue line is the G10 mean average, while pale dotted lines are respective G10 currencies.
Source: MNI/Bloomberg Finance L.P.
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