AYI vs SPY: Correlation
Acuity Inc. (AYI) and SPDR S&P 500 ETF Trust (SPY) show a moderate relationship: their 3-year correlation of weekly returns is 0.54.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AYI and SPY?
Over the past 3 years, AYI and SPY moved with a correlation of 0.54, which is moderate. The link has loosened recently: the 1-year correlation (0.26) runs below the 3-year figure (0.54). Over 5 years the correlation is 0.56, and the annualized covariance of weekly returns is 235.2 %².
By 3-year correlation, SPY places #6 of the 12 assets tracked against AYI. Correlation aside, the last 12 months split them widely, with SPY ahead by 18.0 points (+2.6% versus +20.6%). One caveat on sizing: AYI is 2.1 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
AYI vs SPY: side by side
| AYI (Acuity Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +2.6% | +20.6% |
| 5-year return | +86.6% | +82.4% |
| Volatility (ann.) | 30.1% | 14.5% |
| Beta vs S&P 500 | 1.13 | 1.00 |
| Max drawdown (3Y) | -33.7% | -18.8% |
| Market cap | $10.2B | – |
| P/E (trailing) | 22.7 | – |
| Dividend yield | 0.22% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | AYI | SPY |
|---|---|---|
| 2022 | -21.5% | -18.2% |
| 2023 | +24.1% | +26.2% |
| 2024 | +42.9% | +24.9% |
| 2025 | +23.5% | +17.7% |
| 2026 | -4.9% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AYI and SPY good diversifiers for each other?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between AYI and SPY?
Using weekly returns as of 2026-08-27: 0.54 over 3 years, with 0.26 over the last year and 0.56 over 5 years.
Is SPY a good diversifier for AYI?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.54 mean?
A reading of 0.54 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: AYI correlations · SPY correlations
