ATS vs SPY: Correlation
ATS Corporation (ATS) and SPDR S&P 500 ETF Trust (SPY) show a moderate relationship: their 3-year correlation of weekly returns is 0.41.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ATS and SPY?
Over the past 3 years, ATS and SPY moved with a correlation of 0.41, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.28 versus 0.41 over 3 years. Over 5 years the correlation is 0.41, and the annualized covariance of weekly returns is 222.4 %².
SPY is close to the least connected end of ATS's tracked universe, ranking #6 of 10. Correlation aside, the last 12 months split them widely, with SPY ahead by 49.1 points (-28.5% versus +20.6%). One caveat on sizing: ATS is 2.6 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.
ATS vs SPY: side by side
| ATS (ATS Corporation) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -28.5% | +20.6% |
| 5-year return | -46.0% | +82.4% |
| Volatility (ann.) | 38.0% | 14.5% |
| Beta vs S&P 500 | 1.06 | 1.00 |
| Max drawdown (3Y) | -57.3% | -18.8% |
| Market cap | $1.9B | – |
| P/E (trailing) | 57.1 | – |
| Dividend yield | 0.00% | 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 | ATS | SPY |
|---|---|---|
| 2022 | -22.1% | -18.2% |
| 2023 | +39.2% | +26.2% |
| 2024 | -29.2% | +24.9% |
| 2025 | -9.6% | +17.7% |
| 2026 | -29.5% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ATS and SPY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.41 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ATS and SPY?
Using weekly returns as of 2026-08-27: 0.41 over 3 years, with 0.28 over the last year and 0.41 over 5 years.
Is SPY a good diversifier for ATS?
Yes, to a useful degree: a correlation of 0.41 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.41 mean?
On the −1 to +1 scale, 0.41 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.
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Related comparisons
Hubs: ATS correlations · SPY correlations
