CTS vs SPY: Correlation
Measured on weekly returns over the past three years, CTS Corporation (CTS) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.61, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CTS and SPY?
Over the past 3 years, CTS and SPY moved with a correlation of 0.61, which is strong. The past 12 months show a weaker link (0.42) than the 3-year average (0.61). Over 5 years the correlation is 0.48, and the annualized covariance of weekly returns is 291.8 %².
Among the 26 assets we track against CTS, SPY ranks #13 by 3-year correlation. Correlation aside, the last 12 months split them widely, with CTS ahead by 15.2 points (+35.8% versus +20.6%). Note the risk asymmetry: CTS runs 2.3 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
CTS vs SPY: side by side
| CTS (CTS Corporation) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +35.8% | +20.6% |
| 5-year return | +63.4% | +82.4% |
| Volatility (ann.) | 33.0% | 14.5% |
| Beta vs S&P 500 | 1.40 | 1.00 |
| Max drawdown (3Y) | -40.6% | -18.8% |
| Market cap | $1.6B | – |
| P/E (trailing) | 23.8 | – |
| Dividend yield | 0.28% | 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 | CTS | SPY |
|---|---|---|
| 2022 | +7.8% | -18.2% |
| 2023 | +11.4% | +26.2% |
| 2024 | +20.9% | +24.9% |
| 2025 | -18.4% | +17.7% |
| 2026 | +34.7% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CTS and SPY good diversifiers for each other?
To a limited degree. At 0.61 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between CTS and SPY?
Using weekly returns as of 2026-08-27: 0.61 over 3 years, with 0.42 over the last year and 0.48 over 5 years.
Is SPY a good diversifier for CTS?
To a limited degree. At 0.61 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.61 mean?
A reading of 0.61 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: CTS correlations · SPY correlations
