StrategyIntermediate#Macro#Forex
DXY (US Dollar Index)
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Definition
The ICE U.S. Dollar Index: a fixed-weight, geometrically averaged measure of the US dollar against six currencies. It is one currency-index methodology, not a global-liquidity measure or a Bitcoin price signal.
Source reviewed
- ICE: U.S. Dollar Index futures opens in a new tab
Supports: ICE describes USDX/DXY as a geometrically averaged, fixed-weight calculation of six component currencies and identifies its spot-price input method.
- Federal Reserve via FRED: Nominal Broad U.S. Dollar Index opens in a new tab
Supports: The Federal Reserve's broad trade-weighted dollar series illustrates that a broader dollar measure uses a different basket and methodology from DXY.
Concept Diagram
Key Takeaways
1
DXY is a fixed-weight index of the US dollar against six currencies, not every currency or a global-liquidity measure.
2
Its large euro weight means it can differ materially from broader trade-weighted dollar series.
3
A DXY and Bitcoin correlation needs a specified sample and does not establish causation or a trade rule.
4
Use dated, independent evidence and a documented risk process rather than an automated one-index response.
Practical Example
A researcher labels a DXY chart with its six-currency methodology and the exact observation time. They compare it with a broader trade-weighted dollar series, Bitcoin returns over a stated period, rates, and volatility. The result is recorded as a conditional historical observation, not a forecast or an automatic leverage rule.
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