US CPI surged to 3.8% y/y, shifting Fed rate hike odds to 33%. UK political risk pushed Starmer exit probability to 66%, driving 30-year Gilt yields to their highest since 1998.
The US dollar strengthened and the British pound recorded its worst daily decline since early April after the April US consumer price index printed at 3.8% year-on-year, a three-year high. The inflation surprise shifted Federal Reserve rate hike probabilities and exposed fresh political risk in the UK, sending GBP/USD sharply lower.
The headline number was propelled by energy prices, which are volatile and largely outside the control of monetary policy. Central banks therefore focus on core inflation, which strips out food and energy. In April, core CPI climbed to 2.8%, moving further away from the Fed’s 2% target. The core reading matters because it can feed second-round effects. If businesses pass higher energy costs through to consumers and wages begin to adjust, inflation becomes stickier. CPI indices remain well below their 2022 peaks, so the Fed does not yet need to tighten aggressively. The risk, however, is that the 2.8% core print is not the peak.
Markets now assign a 33% probability to the Fed tightening rates this year, up from 16% a week earlier. The date when the probability of a rate hike from current levels exceeds 50% has moved forward from April to March 2027. This repricing directly strengthened the dollar by widening the expected interest rate differential against currencies where central banks are still easing or on hold.
MUFG (Alpha Score 63, Moderate) flagged a separate energy risk for Europe. Gas stocks in the Amsterdam–Rotterdam–Antwerp (ARA) energy hub are depleting. European natural gas prices have not spiked to the levels seen four years ago because storage facilities started the season full. Should the inventory drawdown accelerate, the risk of a decline in EUR/USD begins to mount.
European gas storage acts as a buffer against supply shocks. When stocks are high, spot prices remain anchored. As stocks fall, the marginal buyer gains pricing power. MUFG’s warning is that the buffer is thinning. A sustained rise in European gas prices would widen the rate differential with the US by pressuring the European Central Bank to stay looser for longer, directly weighing on the euro. EUR/USD profile
Goldman Sachs (Alpha Score 56, Moderate) cited several arguments for selling EUR/USD and buying the dollar against the British pound and the Swedish krona:
Higher Treasury yields increase the carry advantage of holding dollars over euros, pounds, or kronor. When Goldman Sachs bundles these three pairs into a single dollar-bullish call, it is betting that the rate differential will widen further. The Swedish krona is particularly sensitive because the Riksbank has less room to match Fed hawkishness without damaging a fragile domestic economy.
The British pound’s sell-off was amplified by a domestic political shock. Following Labour’s defeat in local elections, an increasing number of party members are calling for Keir Starmer to step down as leader. The Polymarket betting market raised the probability of such an outcome by the end of 2026 from 48% to 66% in just a few days.
| Probability Metric | Before | After |
|---|---|---|
| Fed rate hike in 2025 | 16% | 33% |
| Starmer exit by end-2026 | 48% | 66% |
Investors fear that a new government led by a proponent of fiscal stimulus would reignite the conflict between loose fiscal policy and tight monetary policy that sent GBP/USD to a historic low in 2022. The mechanism is straightforward: unfunded spending increases bond supply, drives up yields, and forces the Bank of England to choose between controlling inflation and supporting the bond market. Sterling typically suffers during that uncertainty.
So far, the parallel to 2022 is visible only in the debt market. Against a backdrop of bond sell-offs, yields on 30-year Gilts have risen to their highest level since 1998. The move is not yet disorderly. It signals that the market is beginning to price a higher UK risk premium.
Long-dated Gilt yields reflect expectations for future inflation, growth, and fiscal credibility. A rise to multi-decade highs suggests the market is demanding more compensation for holding UK sovereign debt. If that repricing accelerates, it will feed directly into higher mortgage rates and tighter financial conditions, creating a headwind for the pound even before any political transition occurs.
The next Fed meeting in June will be closely watched for any shift in language that validates the market’s repricing of rate hike odds. For sterling, the immediate catalyst is the internal Labour Party dynamics. Any formal challenge to Starmer’s leadership would likely trigger another leg lower in GBP/USD. The fiscal uncertainty premium would get priced in more fully.
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