BIAF vs SPY: Correlation
bioAffinity Technologies, Inc. (BIAF) and SPDR S&P 500 ETF Trust (SPY) show a near-zero relationship: their 3-year correlation of weekly returns is -0.04.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BIAF and SPY?
On 3 years of weekly data the BIAF/SPY correlation comes out at -0.04, near zero, meaning they move largely independently. Recent behaviour matches the longer record: -0.01 over 1 year against -0.04 over 3. The 5-year figure is -0.02, and annualized covariance runs at -437.7 %².
By 3-year correlation, SPY places #13 of the 24 assets tracked against BIAF. The last year tells two different stories: SPY led by 52.6 percentage points, -32.0% for BIAF against +20.6% for SPY. Note the risk asymmetry: BIAF runs 47.7 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
BIAF vs SPY: side by side
| BIAF (bioAffinity Technologies, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -32.0% | +20.6% |
| 5-year return | n/a | +82.4% |
| Volatility (ann.) | 691.4% | 14.5% |
| Beta vs S&P 500 | -2.10 | 1.00 |
| Max drawdown (3Y) | -99.6% | -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 | BIAF | SPY |
|---|---|---|
| 2022 | – | -18.2% |
| 2023 | -8.1% | +26.2% |
| 2024 | -38.1% | +24.9% |
| 2025 | -95.7% | +17.7% |
| 2026 | +328.8% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BIAF and SPY good diversifiers for each other?
By historical standards, yes. A correlation of -0.04 means the two rarely move for the same reasons.
FAQ
What is the correlation between BIAF and SPY?
Using weekly returns as of 2026-08-27: -0.04 over 3 years, with -0.01 over the last year and -0.02 over 5 years.
Is SPY a good diversifier for BIAF?
By historical standards, yes. A correlation of -0.04 means the two rarely move for the same reasons.
What does a correlation of -0.04 mean?
A reading of -0.04 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: BIAF correlations · SPY correlations
