BBW vs SER: Correlation
Measured on weekly returns over the past three years, Build-A-Bear Workshop, Inc. (BBW) and Serina Therapeutics, Inc. (SER) carry a correlation of 0.34, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BBW and SER?
Across a 3-year window, the weekly returns of BBW and SER correlate at 0.34, moderate. The relationship has been stable: the 1-year correlation (0.37) sits close to the 3-year figure. Stretching to 5 years gives 0.29, with an annualized covariance of 1602.2 %².
Among the 16 assets we track against BBW, SER ranks #6 by 3-year correlation. Twelve-month performance is nearly a tie, at -50.4% for BBW and -49.5% for SER. Note the risk asymmetry: SER runs 2.0 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.
BBW vs SER: side by side
| BBW (Build-A-Bear Workshop, Inc.) | SER (Serina Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | -50.4% | -49.5% |
| 5-year return | +86.4% | -93.1% |
| Volatility (ann.) | 48.4% | 98.4% |
| Beta vs S&P 500 | 0.89 | -0.30 |
| Max drawdown (3Y) | -61.7% | -95.5% |
| Market cap | – | $0.1B |
| P/E (trailing) | 9.1 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BBW | SER |
|---|---|---|
| 2022 | +22.1% | -49.4% |
| 2023 | +2.8% | -30.3% |
| 2024 | +105.6% | -63.6% |
| 2025 | +35.4% | -61.8% |
| 2026 | -53.0% | +31.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BBW and SER good diversifiers for each other?
Reasonably. At 0.34, BBW and SER keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between BBW and SER?
As of 2026-08-27, the correlation of weekly returns between BBW and SER is 0.34 over 3 years, 0.37 over 1 year and 0.29 over 5 years.
Is SER a good diversifier for BBW?
Reasonably. At 0.34, BBW and SER keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.34 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.
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Related comparisons
Hubs: BBW correlations · SER correlations
