The British pound experienced a sharp and sustained sell-off against the US dollar on Wednesday, September 17th, 2025, following a profoundly dovish monetary policy decision from the Bank of England. The Monetary Policy Committee (MPC) voted 7-2 to lower the Bank Rate by 25 basis points to 4.75%, a move that was anticipated by only a minority of market participants. The accompanying minutes and forward guidance, however, were what truly catalyzed the aggressive bearish momentum for sterling.
The central bank explicitly signaled that this cut was likely the first in a cycle, citing a more rapid than expected return of inflation to target and a clear softening in the domestic labour market. Governor Rachel Reeves emphasized a data-dependent approach but stated that the current economic conditions warranted a shift towards an accommodative stance to support growth and guard against the risks of undershooting the inflation target in the medium term.
This decisive action was underpinned by the morning’s key data release, which showed UK Consumer Price Index (CPI) inflation had cooled to 1.6% year-on-year in August, notably below the BoE’s own 2.0% target and consensus forecasts of 1.9%. The core CPI figure, which strips out volatile food and energy prices, also fell more than expected to 2.1%. This data effectively removed the final barrier to action for the majority of the committee, who had previously expressed caution about persistent underlying price pressures.
The narrative of “higher for longer” UK interest rates, which had provided a key pillar of support for the pound throughout much of 2024 and early 2025, was decisively dismantled within a few hours. In contrast, the US dollar remained well-bid across the board as markets continued to price in a more patient approach from the Federal Reserve following yesterday’s firm US retail sales data.
The price action was unequivocal. GBP/USD gapped lower at the Asian open and proceeded to break through several key technical support levels with ease. The pair plummeted over two hundred pips, its largest single-day decline in months, breaching the psychologically significant 1.2200 handle to trade at levels last seen in mid-July. Market pricing now implies a further 50 basis points of easing from the BoE by the end of the first quarter of 2026, a dramatic repricing of UK interest rate expectations.
For the currency pair, the path of least resistance is now firmly skewed to the downside. The widening interest rate differential in favour of the US dollar, coupled with a risk-off sentiment in global equity markets boosting demand for the greenback as a safe haven, created a perfect storm for cable. Traders will now look towards upcoming UK retail sales and PMI data for confirmation of the economic slowdown the BoE is attempting to address, with any further weakness likely to extend the pound’s losses.
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