PRFX vs SPY: Correlation
Measured on weekly returns over the past three years, PRF Technologies Ltd. (PRFX) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.12, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PRFX and SPY?
On 3 years of weekly data the PRFX/SPY correlation comes out at 0.12, weak. The past 12 months show a tighter link (0.38) than the 3-year average (0.12). The 5-year figure is 0.12, and annualized covariance runs at 513.9 %².
Within PRFX's tracked universe of 23 assets, SPY comes in at #18 by 3-year correlation. Correlation aside, the last 12 months split them widely, with SPY ahead by 108.3 points (-87.7% versus +20.6%). Risk is not evenly split, since PRFX carries 20.1 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.
PRFX vs SPY: side by side
| PRFX (PRF Technologies Ltd.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -87.7% | +20.6% |
| 5-year return | -99.9% | +82.4% |
| Volatility (ann.) | 291.2% | 14.5% |
| Beta vs S&P 500 | 2.46 | 1.00 |
| Max drawdown (3Y) | -99.3% | -18.8% |
| Market cap | – | – |
| 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 | PRFX | SPY |
|---|---|---|
| 2022 | -68.9% | -18.2% |
| 2023 | -33.4% | +26.2% |
| 2024 | -79.7% | +24.9% |
| 2025 | -80.9% | +17.7% |
| 2026 | -69.3% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PRFX and SPY good diversifiers for each other?
Yes: at 0.12, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between PRFX and SPY?
As of 2026-08-27, the correlation of weekly returns between PRFX and SPY is 0.12 over 3 years, 0.38 over 1 year and 0.12 over 5 years.
Is SPY a good diversifier for PRFX?
Yes: at 0.12, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of 0.12 mean?
A reading of 0.12 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: PRFX correlations · SPY correlations
