DXY: The Dollar Index Every Macro Trader Watches
Macro Glossary, Macro Drivers
By Ken Chigbo, macro trader and founder of KenMacro, 18+ years in markets.
Updated 2026-05-20
The desk’s answer
The DXY is a fixed-weight index of the US dollar against six other major currencies, with the euro carrying roughly 57.6 percent of the basket. A reading of 105.00 means broad dollar strength versus the basket has risen 5 percent above the 1973 baseline of 100. It is a euro-heavy read, not a true global dollar index, which is why a DXY move can be a euro story wearing a dollar mask. Used as a regime gauge first, single-pair direction second.
Defined term, DXY (US Dollar Index)
The DXY is the ICE US Dollar Index, a fixed-weight geometric average of the dollar against six major currencies, dominated by the euro at roughly 57.6 percent of the basket, followed by the yen, sterling, Canadian dollar, Swedish krona and Swiss franc. It is the standard single-number proxy for broad dollar strength and the default regime gauge for macro traders.
What the DXY actually measures
The DXY is the ICE dollar index, a geometric average of the dollar against six currencies in fixed weights set in 1973: EUR 57.6 percent, JPY 13.6 percent, GBP 11.9 percent, CAD 9.1 percent, SEK 4.2 percent, CHF 3.6 percent. The weights have not been updated to reflect modern trade flows, so the Chinese yuan, Mexican peso and Korean won are absent. The Federal Reserve publishes a broader trade-weighted dollar index (TWEXBGSMTH) that is a more accurate measure of true dollar strength, but the DXY is what trades on screens because it has a deep futures market.
How the DXY moves in practice
Because the euro is more than half the basket, the DXY is largely a EUR/USD chart inverted with a small correction from the yen and pound. A move from 104 to 106 is typically driven by a sharp move in EUR/USD, with the yen and pound contributing modestly. A 100-point DXY move is roughly equivalent to a 200-pip move in EUR/USD on average. This is the practical mental model: the DXY is the euro story plus satellites, not a full global dollar read.
When the DXY misleads and what to cross-check
A rising DXY against a falling broad trade-weighted dollar means the dollar is gaining on the euro and losing against emerging market currencies and the yuan, which is a different regime entirely. In risk-off the DXY usually rises, but in 2024-style scenarios where the yuan and EM currencies depreciate fastest, the broad dollar can rip while the DXY barely moves. The desk reads the DXY for screen action but cross-checks the broader TWEXBGSMTH before sizing a multi-asset macro view.
Frequently asked
What does a DXY reading of 105 mean?
It means broad dollar strength against the six-currency basket is 5 percent above the 1973 baseline of 100. The index has no native units, it is an index level, and traders watch the change and the rate of change more than the absolute number.
Is the DXY a true measure of dollar strength?
Only against a narrow developed-market basket. The euro alone is 57.6 percent of the weight, and the yuan, peso and won are absent. The Fed’s broad trade-weighted dollar (TWEXBGSMTH) is more accurate but less tradeable because there is no deep futures market.
How do traders use the DXY?
As a regime gauge before reading any single pair. A trending DXY says the dollar is the story, a ranging DXY says individual pair drivers are the story, and an inflection around a Fed event says the broad dollar is repricing the rate path.
What this means at the desk
The DXY is the regime read, not the trade. If it disagrees with the pair, the pair usually loses.
Read next from the desk
Educational glossary entry only,
From the desk
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