SPY vs USNA: Correlation
How closely do SPDR S&P 500 ETF Trust (SPY) and USANA Health Sciences, Inc. (USNA) trade together? Their weekly returns over three years give a correlation of 0.30, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SPY and USNA?
Across a 3-year window, the weekly returns of SPY and USNA correlate at 0.30, moderate. The link has loosened recently: the 1-year correlation (0.15) runs below the 3-year figure (0.30). Stretching to 5 years gives 0.30, with an annualized covariance of 187.1 %².
Among the 4755 assets we track against SPY, USNA ranks #2250 by 3-year correlation. Correlation aside, the last 12 months split them widely, with SPY ahead by 76.7 points (+20.6% versus -56.1%). Risk is not evenly split, since USNA carries 2.9 times the volatility of the other side.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
SPY vs USNA: side by side
| SPY (SPDR S&P 500 ETF Trust) | USNA (USANA Health Sciences, Inc.) | |
|---|---|---|
| 1-year return | +20.6% | -56.1% |
| 5-year return | +82.4% | -85.5% |
| Volatility (ann.) | 14.5% | 42.6% |
| Beta vs S&P 500 | 1.00 | 0.90 |
| Max drawdown (3Y) | -18.8% | -80.1% |
| Market cap | – | $0.3B |
| P/E (trailing) | – | – |
| Dividend yield | 1.01% | 0.00% |
| Expense ratio | 0.09% | – |
| Assets under management | $795.3B | – |
| Sector / category | ETF · US Large Cap | US Listed |
SPY, State Street Investment Management's Large Blend fund, carries $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | SPY | USNA |
|---|---|---|
| 2022 | -18.2% | -47.4% |
| 2023 | +26.2% | +0.8% |
| 2024 | +24.9% | -33.0% |
| 2025 | +17.7% | -45.3% |
| 2026 | +13.7% | -28.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SPY and USNA good diversifiers for each other?
Reasonably. At 0.30, SPY and USNA keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between SPY and USNA?
Using weekly returns as of 2026-08-27: 0.30 over 3 years, with 0.15 over the last year and 0.30 over 5 years.
Is USNA a good diversifier for SPY?
Reasonably. At 0.30, SPY and USNA keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.30 mean?
On the −1 to +1 scale, 0.30 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/spy-vs-usna.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/spy-vs-usna/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: SPY correlations · USNA correlations
