MTX vs SPY: Correlation
How closely do Minerals Technologies Inc. (MTX) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.43, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MTX and SPY?
Over the past 3 years, MTX and SPY moved with a correlation of 0.43, which is moderate. The past 12 months show a weaker link (0.08) than the 3-year average (0.43). Over 5 years the correlation is 0.51, and the annualized covariance of weekly returns is 187.1 %².
Among the 17 assets we track against MTX, SPY ranks #10 by 3-year correlation. The trailing year gives SPY the advantage: +12.0% versus +20.6%, a 8.6-point spread. Note the risk asymmetry: MTX runs 2.1 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.
MTX vs SPY: side by side
| MTX (Minerals Technologies Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +12.0% | +20.6% |
| 5-year return | -6.2% | +82.4% |
| Volatility (ann.) | 30.4% | 14.5% |
| Beta vs S&P 500 | 0.90 | 1.00 |
| Max drawdown (3Y) | -42.5% | -18.8% |
| Market cap | $2.3B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.65% | 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 | MTX | SPY |
|---|---|---|
| 2022 | -16.7% | -18.2% |
| 2023 | +18.0% | +26.2% |
| 2024 | +7.4% | +24.9% |
| 2025 | -19.4% | +17.7% |
| 2026 | +19.2% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MTX and SPY good diversifiers for each other?
A fair diversifier. At 0.43, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between MTX and SPY?
As of 2026-08-27, the correlation of weekly returns between MTX and SPY is 0.43 over 3 years, 0.08 over 1 year and 0.51 over 5 years.
Is SPY a good diversifier for MTX?
A fair diversifier. At 0.43, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.43 mean?
A reading of 0.43 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: MTX correlations · SPY correlations
