BSEM vs SPY: Correlation
How closely do BioStem Technologies, Inc. (BSEM) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.21, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSEM and SPY?
Over the past 3 years, BSEM and SPY moved with a correlation of 0.21, which is weak. The relationship has been stable: the 1-year correlation (0.24) sits close to the 3-year figure. Over 5 years the correlation is 0.05, and the annualized covariance of weekly returns is 344.2 %².
Out of 12 assets tracked against BSEM, SPY lands near the bottom at #8. Correlation aside, the last 12 months split them widely, with SPY ahead by 60.3 points (-39.7% versus +20.6%). One caveat on sizing: BSEM is 7.8 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.
BSEM vs SPY: side by side
| BSEM (BioStem Technologies, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -39.7% | +20.6% |
| 5-year return | +263.2% | +82.4% |
| Volatility (ann.) | 113.1% | 14.5% |
| Beta vs S&P 500 | 1.65 | 1.00 |
| Max drawdown (3Y) | -88.0% | -18.8% |
| Market cap | $0.1B | – |
| P/E (trailing) | 4.1 | – |
| 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 | BSEM | SPY |
|---|---|---|
| 2022 | +187.5% | -18.2% |
| 2023 | +96.0% | +26.2% |
| 2024 | +136.2% | +24.9% |
| 2025 | -72.5% | +17.7% |
| 2026 | +1.0% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSEM and SPY good diversifiers for each other?
A fair diversifier. At 0.21, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between BSEM and SPY?
Using weekly returns as of 2026-08-27: 0.21 over 3 years, with 0.24 over the last year and 0.05 over 5 years.
Is SPY a good diversifier for BSEM?
A fair diversifier. At 0.21, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
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: BSEM correlations · SPY correlations
