Why EUR/USD Rates Move: The Drivers and the Volatility You Can Expect

Exchange rates move because the quantity of one currency people want to hold changes relative to the quantity of the other, and that balance shifts with every piece of information that changes the expected return on holding euros instead of dollars. The most durable version of this logic is the interest rate differential. When euro deposits pay more than dollar deposits for a comparable level of risk, savers and institutions tend to accumulate euros, and the euro appreciates. When the gap narrows or reverses, the flow turns. This mechanism explains most of the medium-term direction of EUR/USD: the pair rose steadily through 2025 as markets priced a shallower Federal Reserve easing path and a larger European fiscal impulse, and it has been under moderate pressure during 2026 as the ECB lifted its deposit rate to 2.50% in September while the Federal Reserve moved to a 3.75% to 4.00% range and European growth expectations softened. Interest rate differentials are powerful but slow, which is why they set the trend while faster catalysts set the day.

Inflation sits directly underneath the policy path and therefore underneath the rate. The euro area harmonised index and the US consumer price index are watched for the same reason: they determine how much room central banks have to move. The distinction that matters for EUR/USD is between inflation and real interest rates. If euro inflation runs at two percent while dollar inflation runs at three, the real return on euro deposits may be higher even though the nominal rate is lower, and the pair can rise despite the nominal gap. Energy prices are a specific and important part of this for the euro area, which imports a large share of its fuel: the 2022 energy shock raised import bills, pushed headline inflation to double digits, squeezed real incomes and contributed to the pair's worst annual range of the century, which ran from roughly 0.96 to 1.15. Conversely, a fall in European gas prices relieves pressure on both inflation and the current account, and that relief tends to support the euro. Wage data, services inflation and rent growth are increasingly watched because they determine whether inflation can settle near target without stalling demand.

The real economy supplies the second stream of drivers. Employment figures from both sides of the Atlantic, industrial production in Germany, retail sales in the United States, PMI surveys that are published before the hard data, and the trade balance all shift the growth outlook, and the growth outlook shifts the expected policy path. In the euro area this is complicated by the fact that there is no single economy but a bloc with very different trajectories, and that the bloc's common budget is a fraction of what national governments spend. When the German economy weakens, the euro typically softens, and when French or Italian fiscal stress rises, the reaction is amplified because markets question the bloc's overall solvency rather than one country's. In the United States, the picture is dominated by the strength of consumption, the fiscal position and, periodically, the politics of trade policy. The broad US tariff announcements of April 2025 produced an unusually fast response in EUR/USD, with the euro advancing more than ten cents in a matter of weeks as investors judged that US growth would suffer more than European growth from the measures.

Policy communication deserves its own category because expectations move before decisions do. Central banks do not simply announce a rate, they describe the path they intend to follow, and markets trade that description. A phrase in a press conference can shift the expected path for the next six months, which is worth far more than the twenty-five basis points actually delivered. This is also why the same decision can produce opposite reactions on different days, and why the most useful question is never what was decided but what had already been priced in. The September 2026 ECB decision that lifted the deposit rate to 2.50% was accompanied by language that suggested further tightening, which is why the euro's reaction was limited: the direction had been anticipated, and the surprise was in the direction of the guidance rather than the size of the move. The corollary is that markets often move most in the days before a scheduled event, as positions are adjusted, and then settle once the event has passed.

Political and fiscal risk operates on a different timescale and produces the most violent reactions. Sovereign debt crises, election results that change policy direction, budget measures that alter the fiscal trajectory, and threats to the independence of institutions all feed into the price, because they change the expected path of future taxation, spending and therefore growth. The euro area's sovereign debt crisis of 2010 to 2012 is the clearest example in the pair's history, when peripheral spreads widened, rating actions followed, and the pair spent much of 2012 in the 1.20 area. The 2022 energy shock that followed Russia's invasion of Ukraine belongs in the same category, since it compressed European growth and forced emergency policy responses. More recently, the decision in March 2025 to loosen Germany's constitutional debt brake to fund defence and infrastructure moved the euro sharply, because it promised a larger domestic fiscal impulse and a change in the German savings surplus that had been supporting the rest of the bloc. None of these are predictable in advance, which is why a position sized for ordinary volatility can be overwhelmed by one political headline.

Sentiment and the behaviour of leveraged investors form the fifth group, and they explain why moves can exceed anything the fundamentals justify. When global risk appetite falls, the dollar usually gains, partly because it is the most liquid currency to move into and partly because US assets are the deepest pool of capital in the world. The opposite is true when confidence returns. On top of this sit positioning effects: leveraged investors who have built large positions in one direction are forced to unwind when the market moves against them, and that unwinding amplifies the move itself. The August 2024 episode, when USD/JPY fell from above 160 to the low 140s within days as Japanese equity futures and global risk positions were liquidated, was a textbook example, and the same mechanism operates in EUR/USD during sharp equity corrections. Volatility also has its own feedback loop, because a wider range of expected outcomes makes hedging more expensive, which changes the flow of funds, which changes the price. For a planner, the practical conclusion is that the calm periods are not evidence that risk has disappeared but evidence that it is not being realised yet.

So how much movement should you expect? History is more useful here than theory. The annual high-to-low range for EUR/USD was about ten cents in the calm years of 2019 and 2023, in the region of fifteen to twenty cents in a typical year such as 2016 or 2021, and thirty cents or more in 2008, 2020 and 2022. The most recent twelve months have been broad, with the pair averaging close to 1.159 and ranging from a low near 1.118 to a high near 1.197 in January 2026, before easing to around 1.119 by late October. A sensible planning assumption is that a currency can travel around twenty cents over a year without anything extraordinary happening, and that in perhaps one year in four the range will be considerably wider. There is also a seasonal rhythm worth remembering without overstating it: liquidity tends to thin in August, when much of Europe is on holiday, and liquidity thins again in late December, and both periods can produce slightly wider spreads even when the underlying rate is calm. Watching GBP/EUR alongside EUR/USD, and USD/JPY as well, tells you how much of a move is a shared dollar effect and how much is genuinely specific to the euro, and it is the difference between two risks that need two different responses.