Macro
Dollar Index (DXY)
Reviewed
What does DXY measure?
The U.S. Dollar Index compares the dollar with a fixed basket of six currencies: the euro, Japanese yen, British pound, Canadian dollar, Swedish krona, and Swiss franc. The euro has by far the largest weight, so EUR/USD moves can dominate the index. ICE's currency-index specification documents the basket and calculation.
How to read the dollar index
A move from 100 to 105 means the dollar has appreciated by 5% against the weighted basket. A rising DXY can reflect higher U.S. interest rates, stronger relative growth, safe-haven demand, or tighter global dollar liquidity. A falling index can reflect the reverse. The level is less useful than the direction, speed, and reason for the move.
Why DXY matters to investors
A stronger dollar can reduce the translated overseas revenue of U.S. multinationals, tighten financing conditions for dollar borrowers, and create a headwind for some dollar-priced commodities and emerging-market assets. These relationships are tendencies, not rules: supply shocks, local policy, and risk sentiment can overpower the currency effect.
Limits of DXY
DXY is not a complete measure of U.S. trade competitiveness. Its legacy basket excludes major trading partners such as China and Mexico. A broad trade-weighted dollar index can be more representative when the question is U.S. commerce rather than the exchange-traded dollar benchmark.
Example
When the dollar index surges, dollar-priced commodities like gold and oil often come under pressure.
Related terms
Dollar Index (DXY) — FAQ
What is Dollar Index (DXY)?
The U.S. Dollar Index (DXY) measures the value of the dollar against a basket of major foreign currencies, serving as a benchmark for the greenback's overall strength.
Can you give an example of Dollar Index (DXY)?
When the dollar index surges, dollar-priced commodities like gold and oil often come under pressure.
What is the difference between DXY and the U.S. dollar?
The U.S. dollar is the currency itself. DXY is an index that tracks the dollar's value against a fixed, weighted basket of six currencies.
What makes the dollar index rise?
DXY can rise when U.S. rates or growth look stronger than those abroad, when investors seek dollar safety, or when global dollar liquidity tightens. The cause matters as much as the move.
Does a higher DXY always hurt stocks?
No. A stronger dollar can pressure exporters and foreign earnings, but stocks can still rise if growth, profits, or risk appetite are strong enough to offset that drag.
Why does the euro matter so much to DXY?
The euro is the largest component of the fixed DXY basket, so changes in EUR/USD typically have more influence than moves in the other five currencies.
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