AEMD vs SPY: Correlation
How closely do Aethlon Medical, Inc. (AEMD) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.18, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AEMD and SPY?
On 3 years of weekly data the AEMD/SPY correlation comes out at 0.18, weak. The relationship has been stable: the 1-year correlation (0.26) sits close to the 3-year figure. The 5-year figure is 0.20, and annualized covariance runs at 303.2 %².
Out of 10 assets tracked against AEMD, SPY lands near the bottom at #7. The last year tells two different stories: SPY led by 117.9 percentage points, -97.3% for AEMD against +20.6% for SPY. One caveat on sizing: AEMD is 8.1 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.
AEMD vs SPY: side by side
| AEMD (Aethlon Medical, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -97.3% | +20.6% |
| 5-year return | -100.0% | +82.4% |
| Volatility (ann.) | 117.3% | 14.5% |
| Beta vs S&P 500 | 1.45 | 1.00 |
| Max drawdown (3Y) | -99.8% | -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 | AEMD | SPY |
|---|---|---|
| 2022 | -84.9% | -18.2% |
| 2023 | -21.8% | +26.2% |
| 2024 | -60.7% | +24.9% |
| 2025 | -96.0% | +17.7% |
| 2026 | -84.3% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEMD and SPY good diversifiers for each other?
Yes: at 0.18, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between AEMD and SPY?
The AEMD/SPY correlation stands at 0.18 on a 3-year window (1 year: 0.26, 5 years: 0.20), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for AEMD?
Yes: at 0.18, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of 0.18 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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/aemd-vs-spy.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/aemd-vs-spy/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: AEMD correlations · SPY correlations
