Markets

DXY — The US Dollar Index

DXY measures the value of the US dollar against a trade-weighted basket of six major currencies — primarily the euro, with smaller weights for the yen, pound sterling, Canadian dollar, Swedish krona, and Swiss franc. It's the single most-watched gauge of dollar strength globally, and its movements ripple through commodity prices, emerging-market credit conditions, and US trade competitiveness.

May 14, 2026DX-Y.NYBforex · dollar · reserve-currency · trade-weighted

DXY

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It's the price of all other prices. Every global asset class is, in some sense, denominated in dollars — commodities are priced in dollars, sovereign reserves are held in dollars, international debt is issued in dollars, and the most liquid safe-haven instrument in any crisis is the dollar. So when the dollar strengthens or weakens against the rest of the world's currencies, that move is the numerator in millions of pricing equations across the global financial system. The DXY isn't just a forex indicator — it's a transmission mechanism.

DXY

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What it measures

DXY is a geometric weighted average of the US dollar against six major currencies, originally established by the Fed in 1973 with weights based on then-current trade flows:

The index was set to a base value of 100.000 in March 1973. A reading above 100 indicates the dollar has strengthened against this basket since 1973; below 100, weakened. Historical range: roughly 70 (2008 low) to 165 (1985 peak).

The series we track is Yahoo Finance's DX-Y.NYB ticker — the ICE-listed dollar index futures (DXY symbol) is one of the most heavily traded forex futures contracts globally. The cash-index calculation runs continuously during the major FX trading day (24 hours, Sunday evening to Friday close).

Why it matters

Two angles.

The global-financial-conditions angle. The dollar's level is a primary input to global financial conditions. When DXY rises, emerging-market financial conditions tighten almost universally (higher dollar debt-service costs, capital outflows, depreciation pressure on EM currencies). When DXY falls, those pressures reverse. The relationship has been formalized in academic and policy work — the IMF's external balance assessment uses dollar dynamics as a major input, and the Fed's own analysis of global financial conditions explicitly tracks DXY-implied EM stress.

The commodity-and-trade angle. Most internationally traded commodities settle in dollars. When DXY rises, non-dollar buyers of oil, gold, copper, and grains face higher local-currency prices for the same physical good. Demand from those buyers tends to fall, putting downward pressure on commodity prices. Conversely, US exporters face headwinds when DXY rises (their goods become more expensive abroad), and importers benefit. These channels operate with lags of several months but are large enough to produce measurable trade-balance effects.

What moves it, and what it moves

Moves DXY:

US vs. foreign interest rate differentials. When the Fed is hiking faster than the ECB or BOJ, dollar yields rise relative to euro and yen yields, attracting capital to dollars. The 2022 Fed-led hiking cycle (vs. a slower ECB and BOJ) was the dominant driver of DXY's surge to 114.
Safe-haven flows. Geopolitical shocks, financial crises, and equity-market panics typically drive flows into dollars regardless of US fundamentals.
Relative growth expectations. Strong US growth vs. weak European growth supports the dollar; the reverse supports the euro.
Treasury issuance and foreign demand. When foreign central banks accumulate dollar reserves, they buy Treasuries and drive DXY higher (the reverse during reserve diversification episodes).
Tariff and trade-policy expectations. Higher US tariffs, somewhat counterintuitively, often strengthen the dollar (reducing US import volume reduces dollar outflow).

DXY moves:

All globally-traded commodity prices (inverse correlation, varying strength by commodity).
Emerging-market equity, currency, and credit pricing.
US multinational corporate earnings (a strong dollar reduces foreign-revenue translation; Apple loses ~$500M of quarterly revenue per 1% DXY move).
US trade balance (with multi-quarter lags).
Gold prices (inverse correlation; gold is the alternative reserve asset to dollars).
Bitcoin prices (BTC has shown intermittent inverse correlation with DXY as it's increasingly positioned as a dollar-debasement hedge).

A worked example: the 2022 dollar surge

DXY entered 2022 around 95.7. The Fed had begun signaling that aggressive tightening was likely. The ECB was several months behind — still maintaining negative deposit rates while euro-area inflation rose. The BOJ remained committed to its yield curve control (YCC) policy at the long end.

The divergence in monetary policy paths produced one of the cleanest DXY rallies in modern history. By March 2022, DXY had reached 98. By June, 105. By September, 110. The peak: 114.78 on September 27-28, 2022 — the highest level since 2002.

Consequences globally were severe:

The British pound fell to an all-time low against the dollar in late September 2022 (GBP/USD touched 1.04). The UK's "mini-budget" crisis under Prime Minister Truss accelerated the move; the Bank of England had to launch emergency gilt purchases.
The Japanese yen weakened to 145, then 150 against the dollar — its weakest level since the late 1990s. The BOJ intervened in FX markets for the first time since 1998, spending tens of billions of dollars to slow the depreciation.
EM central banks delivered emergency hikes. South Korea, Chile, Mexico, Brazil, and others raised policy rates rapidly to defend their currencies, slowing their domestic economies materially.
Commodity prices fell. Despite the Russia-Ukraine war's supply shock, the dollar's strength provided a counterweight to oil and copper prices that would otherwise have spiraled higher.

DXY peaked in September 2022 and began to decline as the gap between Fed expectations and other central banks narrowed. By mid-2024, DXY was back in the 100-106 range — still elevated by historical standards but well below the 2022 stress level.

The current cycle, and the open question

The structural debate around DXY:

"Dollar smile in cycle" — DXY oscillates between US-leadership rallies and global-recovery weakening. The current period (2024-2026) is in transition, with the dollar potentially heading into a weakening leg as the Fed cuts rates faster than other central banks.
"Reserve-currency erosion" — slow but real diversification of global reserves away from dollars (Russia, China, BRICS+ initiatives, gold accumulation by central banks) could produce a multi-year DXY downtrend even when cyclical conditions favor the dollar.
"Dollar dominance is unshakeable" — every alternative reserve currency has structural problems (euro: no joint fiscal authority; yen: deflationary; yuan: capital controls). The dollar's strength may oscillate cyclically but its share of global reserves and trade settlement remains overwhelmingly dominant.

Watch points: COFER data on global reserve composition (IMF publishes quarterly with ~3-month lag); central bank gold purchases (a leading indicator of intentional dollar diversification); Fed-ECB-BOJ policy-rate spreads (the cyclical driver); and US trade deficit dynamics, which structurally pressure the dollar over multi-year windows.

FAQ

What currencies are in the DXY basket and what are their weights?

Six currencies, with weights fixed since 1973: Euro (57.6%), Japanese yen (13.6%), British pound (11.9%), Canadian dollar (9.1%), Swedish krona (4.2%), Swiss franc (3.6%). The dominance of the euro reflects the fact that the index was originally weighted by trade flows in 1973 — when Europe was the United States' largest trading partner. Modern trade is more diversified (China, Mexico, and many other Asian economies are major US trade partners), so DXY has been criticized for over-representing Europe relative to current trade reality. The Fed publishes alternative dollar indices (the Trade-Weighted Real Broad Dollar Index, TWEXBGS) that have more contemporary weightings.

Why is DXY mostly about the euro?

The 57.6% weight is the dominant driver. When DXY moves, most of the move is the EUR/USD pair moving in the opposite direction. A 1% rally in the euro (EUR/USD up 1%) tends to produce a 0.5-0.6% fall in DXY, holding other components roughly constant. This is why traders often track EUR/USD in real-time as a proxy for DXY direction. The remaining components add color — the yen reflects Asia-specific dynamics, the pound reflects UK-specific dynamics — but the euro is the workhorse.

How does DXY affect commodity prices?

Most globally-traded commodities are priced in dollars (oil, gold, copper, corn, sugar). When the dollar strengthens (DXY up), commodities priced in dollars become more expensive for non-dollar buyers, which reduces global demand and tends to push commodity prices down. When the dollar weakens, commodities become cheaper for foreign buyers, demand picks up, and prices rise. The historical correlation between DXY and oil (WTI) is approximately -0.5 over multi-year windows; for gold, it's around -0.4. The relationship isn't deterministic — supply factors matter too — but the dollar's level is a meaningful input to commodity pricing.

What's a 'dollar smile' and why does the dollar sometimes rally in opposite economic conditions?

The 'dollar smile' is a framework (popularized by Stephen Jen, formerly of Morgan Stanley) that explains why the dollar can rally in two opposite scenarios. The dollar strengthens when (a) the US economy is dramatically outperforming the rest of the world — fast growth attracts foreign capital — OR (b) global crisis conditions trigger safe-haven flight into dollars (the most liquid currency, the most-traded sovereign debt). The dollar weakens in the middle: when global growth is roughly synchronized and risk appetite is healthy. The 2022 surge in DXY past 114 was a clean (a) episode — Fed hiking faster than other central banks. The March 2020 COVID surge in DXY was a clean (b) episode — pure safe-haven flight.

Why do emerging markets care so much about DXY?

Most emerging-market sovereign and corporate borrowing is denominated in dollars (the 'original sin' of EM finance). When DXY strengthens, EM borrowers face higher debt-service costs in local-currency terms — their local revenues buy fewer dollars to make interest payments. EM central banks often have to raise their own rates to stabilize their currencies, which slows their domestic economies. Capital tends to flow *out* of EM and into dollar assets during DXY rallies, depressing EM equity and bond prices. The 2022 DXY surge from ~95 to 114 produced exactly this dynamic: EM equity ETFs (EEM) underperformed dramatically, EM debt spreads widened, and several EM central banks delivered surprise rate hikes to defend their currencies.