PMCB vs SPY: Correlation
Measured on weekly returns over the past three years, PharmaCyte Biotech, Inc. (PMCB) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.21, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PMCB and SPY?
Over the past 3 years, PMCB and SPY moved with a correlation of 0.21, which is weak. Recent behaviour matches the longer record: 0.23 over 1 year against 0.21 over 3. Over 5 years the correlation is 0.23, and the annualized covariance of weekly returns is 192.3 %².
Out of 10 assets tracked against PMCB, SPY lands near the bottom at #7. Correlation aside, the last 12 months split them widely, with SPY ahead by 64.9 points (-44.3% versus +20.6%). Risk is not evenly split, since PMCB carries 4.3 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.
PMCB vs SPY: side by side
| PMCB (PharmaCyte Biotech, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -44.3% | +20.6% |
| 5-year return | -83.6% | +82.4% |
| Volatility (ann.) | 62.1% | 14.5% |
| Beta vs S&P 500 | 0.92 | 1.00 |
| Max drawdown (3Y) | -80.3% | -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 | PMCB | SPY |
|---|---|---|
| 2022 | +17.2% | -18.2% |
| 2023 | -26.3% | +26.2% |
| 2024 | -27.3% | +24.9% |
| 2025 | -53.9% | +17.7% |
| 2026 | -25.4% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PMCB and SPY good diversifiers for each other?
Reasonably. At 0.21, PMCB and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between PMCB and SPY?
The PMCB/SPY correlation stands at 0.21 on a 3-year window (1 year: 0.23, 5 years: 0.23), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for PMCB?
Reasonably. At 0.21, PMCB and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.21 mean?
On the −1 to +1 scale, 0.21 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: PMCB correlations · SPY correlations
