CSTM vs SPY: Correlation
Constellium SE (CSTM) and SPDR S&P 500 ETF Trust (SPY) show a moderate relationship: their 3-year correlation of weekly returns is 0.44.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CSTM and SPY?
Across a 3-year window, the weekly returns of CSTM and SPY correlate at 0.44, moderate. Little has changed lately, as the 1-year reading of 0.48 lands near the 3-year figure. Stretching to 5 years gives 0.47, with an annualized covariance of 261.7 %².
By 3-year correlation, SPY places #6 of the 11 assets tracked against CSTM. Their recent paths diverged sharply: over the last 12 months CSTM outperformed by 67.1 percentage points (+87.7% for CSTM against +20.6% for SPY). Risk is not evenly split, since CSTM carries 2.8 times the volatility of the other side.
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.
CSTM vs SPY: side by side
| CSTM (Constellium SE) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +87.7% | +20.6% |
| 5-year return | +38.2% | +82.4% |
| Volatility (ann.) | 41.2% | 14.5% |
| Beta vs S&P 500 | 1.25 | 1.00 |
| Max drawdown (3Y) | -66.3% | -18.8% |
| Market cap | $3.7B | – |
| P/E (trailing) | 7.0 | – |
| 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 | CSTM | SPY |
|---|---|---|
| 2022 | -33.9% | -18.2% |
| 2023 | +68.7% | +26.2% |
| 2024 | -48.5% | +24.9% |
| 2025 | +83.5% | +17.7% |
| 2026 | +45.4% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CSTM and SPY good diversifiers for each other?
Reasonably. At 0.44, CSTM and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between CSTM and SPY?
The CSTM/SPY correlation stands at 0.44 on a 3-year window (1 year: 0.48, 5 years: 0.47), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for CSTM?
Reasonably. At 0.44, CSTM and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.44 mean?
On the −1 to +1 scale, 0.44 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: CSTM correlations · SPY correlations
