Dollar ETF (UUP) vs S&P 500
UUP closed at $27.32 on April 20, 2026 with a YTD total return of roughly 1.55%, while DXY printed 98.14 in early April (its lowest reading since March 2022) before recovering to roughly flat YTD by April 28. SPY at $588 has outperformed UUP by approximately 5% YTD, the cleanest example of a US-exceptionalism-without-dollar-strength regime in the post-2022 record.
Also known as: US Dollar Bull (UUP) (ETF_UUP, dollar ETF) · S&P 500 ETF (SPY) (ETF_SPY, S&P 500, SPX, SP500)
Why This Comparison Matters
UUP closed at $27.32 on April 20, 2026 with a YTD total return of roughly 1.55%, while DXY printed 98.14 in early April (its lowest reading since March 2022) before recovering to roughly flat YTD by April 28. SPY at $588 has outperformed UUP by approximately 5% YTD, the cleanest example of a US-exceptionalism-without-dollar-strength regime in the post-2022 record.
Where the UUP/SPY ratio sits in April 2026 and why it matters
UUP at $27.32 on April 20, 2026 trades roughly 4% below its 12-month high near $28.40 from October 2025, while SPY at $588 sits approximately 6% below its February 2026 all-time high. The UUP/SPY ratio of roughly 0.0464 sits in the bottom decile of the post-2007 distribution, the same percentile observed during the 2007-2008 weak-dollar/strong-equities phase. The configuration matters because UUP and SPY are both supposed to express US-exceptionalism, with the dollar reflecting capital inflows into US assets and SPY reflecting the equity translation of US earnings dominance. When the two diverge as they have YTD 2026, the divergence tells macro desks that capital flows have rotated: foreign inflows are still underwriting US equity multiples (SPY trades near highs) while exiting the dollar leg (DXY at 4-year lows). Morgan Stanley's April 2026 dollar-decline thesis attributes the move to narrowing rate differentials (Fed cut rates 75 bps across 2025 to 3.25-3.50%) and tracking flows into emerging-market equity ETFs running at decade-strongest cumulative levels, which historically associates with weaker dollar regimes.
The DXY composition and what UUP actually tracks
UUP holds long DXY futures, where DXY is the trade-weighted basket of USD against six currencies: euro (57.6%), Japanese yen (13.6%), British pound (11.9%), Canadian dollar (9.1%), Swedish krona (4.2%), and Swiss franc (3.6%). The euro weight dominance means UUP's price action is structurally a USD/EUR proxy, with the Eurozone's monetary policy stance providing the largest swing factor. In Q1 2026, the ECB held rates steady at 2.5% while the Fed cut to 3.25-3.50%, narrowing the rate differential and pulling EUR/USD from 1.04 in November 2025 to roughly 1.13 by late April 2026. That 9% EUR strength against USD translates almost directly into UUP weakness because of the 57.6% basket weight. SPY meanwhile prices US corporate earnings, where roughly 40% of S&P 500 revenue comes from international markets. A weaker dollar therefore mechanically increases SPY's USD-denominated foreign earnings, which is one structural reason SPY can rally while UUP weakens, the opposite of the textbook strong-dollar/weak-equities pattern that dominated 2022-2023.
Multinational earnings exposure and the dollar-equity transmission
Conditional Forward Response (Tail Events)
How S&P 500 ETF (SPY) has historically behaved in the 5 sessions following a top-decile or bottom-decile daily move in US Dollar Bull (UUP). Computed from 1,286 aligned daily observations ending .
Following these triggers, S&P 500 ETF (SPY) rises 0.21% on average over the next 5 sessions, versus an unconditional baseline of +0.23%. 128 qualifying events; S&P 500 ETF (SPY) closed positive in 55% of them.
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Frequently Asked Questions
Why has UUP fallen while SPY holds near highs in 2026?+
UUP's roughly 1.55% YTD return and DXY's 4-year low near 98.14 reflect three drivers: Fed rate cuts in 2025 (75 bps total to 3.25-3.50%) that narrowed rate differentials with the ECB at 2.5%, foreign capital rotation into EM equities running at decade-strongest cumulative levels, and persistent fiscal-deficit concerns weighing on the dollar's reserve appeal. SPY meanwhile rallies because roughly 40% of S&P 500 revenue is international, and a weaker dollar mechanically inflates USD-denominated foreign earnings. The April 2026 configuration represents a US-exceptionalism-without-dollar-strength regime distinct from the 2022-2023 strong-dollar/weak-equities pattern, with mega-cap multinationals (Apple at 60% overseas revenue, Microsoft 50%) capturing most of the translation tailwind while domestic-revenue sectors lag.
What is the historical correlation between UUP and SPY?+
Long-term Pearson correlation of monthly DXY-SPY returns since 1973 is approximately -0.2, a weakly negative relationship rather than a textbook inverse. The correlation is highly regime-dependent and varies from -0.6 in stagflation-like environments to +0.4 in US-exceptionalism episodes such as 2014-2015 when ECB QE divergence drove dollar and equities higher together. April 2026 sits in the negative tail of the regime distribution, with the rolling 12-month correlation near -0.5. The instability of the correlation is the structural reason allocators do not simply use UUP as an SPY hedge: the relationship breaks down in roughly 30% of historical 12-month windows, often during the precise stress events when an effective hedge would be most valuable.
How does dollar weakness affect S&P 500 earnings?+
WisdomTree research indicates every 10% sustained DXY move changes S&P 500 EPS by roughly 2-4%, with the impact concentrated in the most globally exposed names. The roughly 7% DXY decline from late-2025 highs to April 2026 lows mechanically lifts S&P 500 EPS by approximately 1.5-2.8%. Apple (60% overseas revenue), Microsoft (50%), Coca-Cola (65%), and Procter & Gamble (55%) capture most of the translation tailwind. Domestic-revenue-heavy sectors (utilities, regional banks, small-cap industrials) capture little of the benefit, which is why the April 2026 SPY rally has been concentrated in mega-cap multinationals.
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Data sourced from FRED, CoinGecko, CBOE, and other providers. This page is for informational purposes only and does not constitute financial advice. Past performance does not guarantee future results.