What is the DXY (US Dollar Index)?
The DXY (US Dollar Index) is a measure of the value of the United States dollar relative to a basket of 6 foreign currencies. It was established in 1973 by the Intercontinental Exchange (ICE) with a base value of 100. A DXY reading above 100 means the dollar is stronger than its 1973 baseline; below 100 means it is weaker.
The basket is composed of 6 currencies with fixed weights: Euro (EUR) at 57.6%, Japanese Yen (JPY) at 13.6%, British Pound (GBP) at 11.9%, Canadian Dollar (CAD) at 9.1%, Swedish Krona (SEK) at 4.2%, and Swiss Franc (CHF) at 3.6%. The Euro dominates the index, which means DXY movements are heavily influenced by EUR/USD fluctuations.
DXY vs Bitcoin: the inverse correlation
The relationship between DXY and Bitcoin is predominantly inverse. When the dollar strengthens (DXY rises), capital tends to flow toward traditional safe havens — US Treasuries, money market funds, and dollar-denominated assets. When the dollar weakens (DXY falls), global liquidity increases, borrowing becomes cheaper, and risk appetite grows. Capital flows toward equities, commodities, and crypto.
This is not a guaranteed rule — short-term divergences occur regularly. But on a macro scale, the inverse correlation between DXY and Bitcoin has held consistently across every major cycle since 2013. Academic research from the Federal Reserve Bank of St. Louis (FRED) and Bloomberg data confirm that global M2 liquidity — which the DXY reflects inversely — is one of the strongest predictors of risk asset performance.
"When the dollar weakens, it effectively increases the money supply available to the global financial system. Assets priced in dollars — including Bitcoin — become relatively cheaper for international participants." — Bloomberg Macro Research
Key DXY levels and what they mean for crypto
Historically the most favorable macro environment for Bitcoin. Both the 2017 and 2020-2021 bull runs occurred with DXY below 90. Global liquidity is abundant and risk assets thrive.
The dollar is near its baseline. Bitcoin can move in either direction depending on other macro factors like interest rates, M2 supply, and risk sentiment.
The dollar is strengthening. Capital tends to retreat from risk assets. Bitcoin can still rally on idiosyncratic catalysts, but the macro wind is against it.
A very strong dollar drains global liquidity. The 2022 crypto bear market coincided with DXY reaching 114 — the highest level in 20 years. Every prior DXY spike above 105 has been associated with major BTC drawdowns.
Historical examples: DXY and Bitcoin cycles
2017 Bull Run: DXY 103 → 89
In early 2017, the DXY peaked near 103 following the post-election dollar rally. Over the next 12 months, the dollar weakened steadily to 89. During this same period, Bitcoin went from ~$1,000 to nearly $20,000 — a 1,900% move. The weakening dollar created a macro tailwind that amplified the crypto bull cycle.
2020-2021 Bull Run: DXY 102 → 89
The COVID crash in March 2020 caused a brief DXY spike to 102 as investors rushed to cash. The Federal Reserve responded with massive monetary expansion, pushing the DXY down to 89 by January 2021. During this dollar decline, Bitcoin rose from $4,000 to $69,000 — the largest bull run in its history. The combination of dollar weakness and unprecedented M2 expansion created ideal conditions for risk assets.
2022 Bear Market: DXY → 114
As the Federal Reserve began its aggressive rate-hiking cycle in 2022, the DXY surged from 95 to 114 — the highest reading since 2002. Global liquidity contracted sharply. Bitcoin dropped from $47,000 to $15,500, a 67% drawdown. The strong dollar acted as a liquidity vacuum, pulling capital out of every risk asset class simultaneously.
2025: DXY drops to 98, BTC surges to ATH
In early 2025, expectations of Fed rate cuts and a shift in global trade dynamics pushed the DXY down from 107 to 98. As the dollar weakened, Bitcoin surged to new all-time highs. The pattern repeated: dollar weakness released liquidity into the system, and Bitcoin — as the leading risk-on asset — captured a significant share of that capital flow.
The DXY is one of 37 indicators the NHCI tracks in real time. The current macro liquidity conditions — including dollar strength, M2 supply, and yield curve position — are reflected in the live BTC NHCI Score.
See full BTC NHCI analysis →How the NHCI uses the DXY
The NHCI Score incorporates the DXY within its macro liquidity category — one of 6 indicator categories that make up the composite score. The DXY is evaluated alongside other macro signals like the VIX (volatility index), M2 money supply growth, federal funds rate, and yield curve shape.
Rather than using the DXY as a standalone signal, the NHCI normalizes it against its own historical range and combines it with 36 other indicators — including on-chain metrics like MVRV and NUPL, market structure signals, and sentiment data — to produce a single 0-100 score representing where Bitcoin is in its market cycle. The macro category ensures that global liquidity conditions are always factored into the cycle reading.
Frequently asked questions
Does Bitcoin always go up when the DXY goes down?
No. The inverse correlation is a macro tendency, not a mechanical rule. Short-term divergences happen frequently — Bitcoin can rally during brief DXY spikes or decline during minor dollar weakness. The correlation is strongest on longer timeframes (weeks to months) and during significant DXY moves of 5+ points. This is why the NHCI combines DXY with 36 other indicators rather than relying on it alone.
What causes the DXY to move?
The main drivers of DXY movements are: Federal Reserve interest rate decisions (higher rates strengthen the dollar), US economic data relative to other economies, geopolitical events that trigger flight-to-safety flows, trade balance shifts, and expectations about future monetary policy. Since the Euro has a 57.6% weight in the DXY, European Central Bank (ECB) policy decisions also have a significant impact.
Is the DXY the same as the dollar's purchasing power?
No. The DXY measures the dollar's value relative to other fiat currencies — not its real purchasing power. The dollar can be rising against the Euro (DXY up) while simultaneously losing purchasing power against real goods due to inflation. This distinction matters for Bitcoin: even a rising DXY does not mean the dollar is maintaining real value, which is part of Bitcoin's long-term thesis as an inflation hedge.
See the full picture — free, always.
The NeverHodl Dashboard shows all 37 indicators live — including macro liquidity signals like the DXY — with hourly AI cycle analysis and historical context. No account required.
Methodology → · Live API → · Data Attribution →
Key takeaways
- The DXY measures the US dollar against 6 major currencies (EUR 57.6%, JPY 13.6%, GBP 11.9%, CAD 9.1%, SEK 4.2%, CHF 3.6%)
- Dollar weakness (DXY falling) historically correlates with Bitcoin strength
- DXY below 90: historically the most favorable macro backdrop for crypto bull runs
- DXY above 105: historically associated with significant BTC drawdowns
- The NHCI uses DXY as one of 37 indicators in its macro liquidity category