EUR/USD vs Dollar Index

EUR/USD measures the price of one euro in US dollars on the spot FX market, published continuously by interbank trading and by the ECB at 14:15 CET. A reading of 1.17 means one euro buys 1.17 US dollars. The DXY (US Dollar Index, ticker DTWEXBGS in FRED for the broad version) is a weighted basket of major foreign currencies measured against the dollar. Two versions are commonly cited: the original ICE DXY (euro 57.6 percent, JPY 13.6 percent, GBP 11.9 percent, CAD 9.1 percent, SEK 4.2 percent, CHF 3.6 percent), and the Federal Reserve's broad nominal dollar index (DTWEXBGS) which weights 26 currencies by trade volume.

The two measures move closely together but diverge during emerging market stress (when the broad index moves more than DXY) and during specific G10 episodes (when DXY moves more). The April 2026 levels: ICE DXY around 98.56, FRED broad TWEX similar but slightly higher around 122 on its different scale. EUR/USD at 1.17 is the single most informative input to either index.

At 57.6 percent weight in the ICE DXY basket, the euro is by far the largest component. A 1 percent move in EUR/USD translates almost mechanically to a 0.58 percent move in DXY in the opposite direction (EUR/USD up means DXY down). The next-largest component, JPY at 13.6 percent, contributes about a quarter as much per percentage move.

This weighting reflects the post-1973 Bretton Woods composition decision, which gave the dollar index a heavy euro tilt that has not been updated to reflect changing trade flows (China is the largest US trading partner but the renminbi is not in DXY). The FRED broad index (DTWEXBGS) corrects for this by including 26 currencies with trade-volume weights, so it captures CNY, MXN, INR, and other major partners. For EUR/USD analysis purposes, the ICE DXY remains the most relevant index because the relationship is strongest there.

The Fed funds target range is 3.50 to 3.75 percent in April 2026, after 100 basis points of cuts from September to December 2024. The ECB deposit facility rate is 2.15 percent following a series of cuts from the 2023 peak of 4.0 percent. The 160 basis point differential is well below the 525 basis point peak in early 2024 (when the Fed was at 5.25 to 5.50 and the ECB at 4.0).

Rate differentials are the single most reliable EUR/USD driver over multi-month horizons. The 525 basis point peak gap coincided with EUR/USD at 1.05 to 1.10 (dollar strong). The current 160 basis point gap supports EUR/USD around 1.17. If the gap narrows further (Fed cutting faster than ECB or ECB hiking on Iran-related inflation), EUR/USD has room to 1.20 to 1.25. If the gap widens (Fed holding while ECB cuts again), EUR/USD could test 1.10 again.

EUR/USD hit parity (1.00) on July 12, 2022, the first time since 2002. The pair bottomed at 0.960 on September 27, 2022, two days after Russia indefinitely shut down Nord Stream 1. The Russian gas cutoff threatened European industrial production through winter and produced one of the worst current account positions for the eurozone in 30 years.

Three forces compounded. The Fed was aggressive (rates from 0.25 percent in March 2022 to 4.50 percent by December). The ECB was slow (first hike not until July 2022, only to 0.50 percent that fall). And the energy shock was concentrated on Europe specifically. EUR/USD recovered above parity on October 27, 2022 after the ECB delivered a 75 basis point hike, and by year-end 2022 was back to 1.07. The episode is the cleanest demonstration of how a regional energy shock can override standard rate-differential analysis.

EUR/USD rose from 1.05 in December 2023 to 1.18 by October 2025, a 12 percent appreciation over 22 months. The drivers: the Fed began cutting rates September 2024 (100 basis points by December 2024), the ECB held the deposit rate stable through Q1 2025 before its own cutting cycle, and the dollar broadly weakened on improving US current account dynamics and reduced safe-haven flows.

The pair traded in a 1.05 to 1.18 range through 2025 to 2026, with the upper bound testing in October 2025 (1.18 high) and pulling back to 1.13 in early 2026 before recovering to 1.17 in April. The recovery has been orderly relative to the 2022 collapse: the maximum 30-day move during the recovery has been about 3 percent, versus 8 percent for some 2022 episodes. The lower volatility reflects more rapid market adaptation to monetary policy divergence and fewer regional shock events.

The Iran conflict that began in late February 2026 has had a more nuanced effect on EUR/USD than the Russia-Ukraine episode in 2022. Europe imports roughly 8 percent of its oil from Persian Gulf sources directly, and about 25 percent via various Middle Eastern transit. Initial Iran war headlines pushed EUR/USD lower (dollar safe-haven bid), but the move was muted at roughly 1.5 percent.

The energy pass-through has been similar to 2022 in absolute terms (oil up, gasoline up, headline inflation up), but the EUR has held up because European energy storage entering 2026 was at high levels (95 percent for natural gas), the response capacity is better-developed (LNG terminals, alternate suppliers), and the rate differential is smaller. EUR/USD has actually appreciated slightly (1.16 to 1.17) since the Iran war began as the broader dollar has weakened on US growth concerns. The pair is decoupling from energy correlation in a way it did not in 2022.

Three specific scenarios produce notable EUR/USD versus DXY divergence. First, when JPY moves sharply: a yen carry unwind (August 2024) or BoJ rate change can move DXY without changing EUR/USD much, because JPY is 13.6 percent of DXY. Second, when emerging market currencies move: a CNY devaluation moves DTWEXBGS more than ICE DXY, so the two dollar indices themselves can diverge.

Third, when capital flows are concentrated by region. Periods of strong flows into US Treasuries from European pension funds (typical late 2010s) compress EUR/USD without comparable broad dollar moves. Periods of EM crisis (2018, 2020) lift DTWEXBGS more than ICE DXY because of CNY, MXN, BRL, and INR movements. The April 2026 environment shows minor divergence: ICE DXY down 1 percent over the month, FRED broad TWEX down 0.6 percent, EUR/USD up 1.4 percent. The EUR is moving slightly more than ICE DXY suggests, indicating euro-specific strength.

Treasury International Capital (TIC) data, released monthly with a 6-week lag, captures cross-border purchases of US Treasuries, agency debt, equities, and corporate bonds. European holdings of US Treasuries reached approximately $1.6 trillion in 2025, the second-largest non-US holding after Japan ($1.1 trillion).

When European pension funds, insurance companies, and central banks expand their dollar asset holdings, they typically buy dollars to fund the purchases, pressuring EUR/USD. The flow correlates with the EUR-USD rate differential at the medium end of the curve (5 to 10 year). When US 10-year yields are 100 basis points or more above bund yields (the typical 2024 to 2025 relationship), TIC flows favor the dollar. When the gap compresses below 100 basis points, flows ease and EUR/USD strengthens. April 2026: US 10Y near 4.2 percent, German 10Y bund near 2.5 percent, gap of 170 basis points, suggesting flows continue to support modestly stronger dollar.

EUR/USD trades roughly $400 billion daily across spot, forward, and swap markets, the most-traded currency pair globally. Bid-ask spreads in interbank markets are typically 0.0001 to 0.0002 (one to two pips), the tightest of any major pair. Retail FX brokers typically widen this to 0.5 to 2 pips depending on liquidity provider and time of day.

The trading session structure: London (8:00 to 17:00 GMT) is the most liquid window with the deepest order book, accounting for roughly 35 percent of daily EUR/USD volume. New York (13:00 to 22:00 GMT) overlaps with London for the high-volume morning window. Asia (Tokyo, Singapore) trades roughly 20 percent of daily volume, primarily for hedging Japanese investor exposure. Major economic data releases (US CPI, NFP, ECB decisions, German IFO) produce concentrated EUR/USD moves; the typical reaction window is 5 to 30 minutes for data and 30 minutes to 2 hours for ECB statements.

Three signals will drive EUR/USD direction over the next 6 to 12 months. First, ECB policy path: the ECB held in March 2026 but markets are pricing 25 to 50 basis points of further cuts in 2026 if Iran energy effects fade. ECB hawkishness on Iran-related inflation would lift EUR/USD. Second, US growth: a US recession or sharp Fed cutting would compress the rate gap and lift EUR/USD; a stronger US economy with sticky inflation would do the opposite.

Third, the Iran war resolution: a Hormuz reopening that crashed WTI back to $70 to $80 would reduce EUR's energy-related discount and let the rate-differential factor dominate. A sustained or escalating conflict would weigh on EUR through industrial production fears and shift safe-haven flows toward the dollar. The April 2026 EUR/USD level of 1.17 reflects modestly favorable positioning; a base case for year-end 2026 is 1.15 to 1.22 depending on which of these three forces dominate.