ISOU vs SPY: Correlation
IsoEnergy Ltd. (ISOU) 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 ISOU and SPY?
On 3 years of weekly data the ISOU/SPY correlation comes out at 0.41, moderate. The relationship has been stable: the 1-year correlation (0.44) sits close to the 3-year figure. The 5-year figure is 0.40, and annualized covariance runs at 389.1 %².
Within ISOU's tracked universe of 14 assets, SPY comes in at #8 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months ISOU outperformed by 35.4 percentage points (+56.0% for ISOU against +20.6% for SPY). One caveat on sizing: ISOU is 4.5 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.
ISOU vs SPY: side by side
| ISOU (IsoEnergy Ltd.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +56.0% | +20.6% |
| 5-year return | +42.5% | +82.4% |
| Volatility (ann.) | 65.5% | 14.5% |
| Beta vs S&P 500 | 1.86 | 1.00 |
| Max drawdown (3Y) | -69.0% | -18.8% |
| Market cap | $0.8B | – |
| 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 | ISOU | SPY |
|---|---|---|
| 2022 | -28.1% | -18.2% |
| 2023 | +31.1% | +26.2% |
| 2024 | -35.1% | +24.9% |
| 2025 | +26.0% | +17.7% |
| 2026 | +34.1% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ISOU and SPY good diversifiers for each other?
Reasonably. At 0.41, ISOU and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between ISOU and SPY?
Using weekly returns as of 2026-08-27: 0.41 over 3 years, with 0.44 over the last year and 0.40 over 5 years.
Is SPY a good diversifier for ISOU?
Reasonably. At 0.41, ISOU and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.41 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: ISOU correlations · SPY correlations
