MEC vs SPY: Correlation
Measured on weekly returns over the past three years, Mayville Engineering Company, Inc. (MEC) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.23, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MEC and SPY?
Across a 3-year window, the weekly returns of MEC and SPY correlate at 0.23, weak. Recent behaviour matches the longer record: 0.21 over 1 year against 0.23 over 3. Stretching to 5 years gives 0.25, with an annualized covariance of 165.7 %².
By 3-year correlation, SPY places #7 of the 12 assets tracked against MEC. The last year tells two different stories: MEC led by 18.9 percentage points, +39.5% for MEC against +20.6% for SPY. One caveat on sizing: MEC is 3.4 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.
MEC vs SPY: side by side
| MEC (Mayville Engineering Company, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +39.5% | +20.6% |
| 5-year return | +34.1% | +82.4% |
| Volatility (ann.) | 49.2% | 14.5% |
| Beta vs S&P 500 | 0.79 | 1.00 |
| Max drawdown (3Y) | -45.8% | -18.8% |
| Market cap | $0.5B | – |
| P/E (trailing) | – | – |
| 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 | MEC | SPY |
|---|---|---|
| 2022 | -15.1% | -18.2% |
| 2023 | +13.9% | +26.2% |
| 2024 | +9.0% | +24.9% |
| 2025 | +19.1% | +17.7% |
| 2026 | +8.7% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MEC and SPY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.23 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between MEC and SPY?
As of 2026-08-27, the correlation of weekly returns between MEC and SPY is 0.23 over 3 years, 0.21 over 1 year and 0.25 over 5 years.
Is SPY a good diversifier for MEC?
Yes, to a useful degree: a correlation of 0.23 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.23 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
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Related comparisons
Hubs: MEC correlations · SPY correlations
