BOLD vs SLN: Correlation
How closely do Boundless Bio, Inc. (BOLD) and Silence Therapeutics Plc - American Depository Share (SLN) trade together? Their weekly returns over three years give a correlation of 0.46, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BOLD and SLN?
Across a 3-year window, the weekly returns of BOLD and SLN correlate at 0.46, moderate. The past 12 months show a tighter link (0.61) than the 3-year average (0.46). Stretching to 5 years gives n/a, with an annualized covariance of 3713.1 %².
Few assets follow BOLD as closely as SLN, which ranks #3 of 18 tracked partners. On 12-month performance SLN holds a 7.8-point edge, +150.9% against +158.7%.
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.
BOLD vs SLN: side by side
| BOLD (Boundless Bio, Inc.) | SLN (Silence Therapeutics Plc - American Depository Share) | |
|---|---|---|
| 1-year return | +150.9% | +158.7% |
| 5-year return | n/a | -42.5% |
| Volatility (ann.) | 90.9% | 86.0% |
| Beta vs S&P 500 | 1.60 | 1.27 |
| Max drawdown (3Y) | -92.9% | -91.7% |
| Market cap | $0.1B | $0.8B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BOLD | SLN |
|---|---|---|
| 2022 | – | -36.2% |
| 2023 | – | +13.9% |
| 2024 | – | -60.4% |
| 2025 | -58.6% | -11.6% |
| 2026 | +138.3% | +121.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BOLD and SLN good diversifiers for each other?
Reasonably. At 0.46, BOLD and SLN keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between BOLD and SLN?
As of 2026-08-27, the correlation of weekly returns between BOLD and SLN is 0.46 over 3 years, 0.61 over 1 year and n/a over 5 years.
Is SLN a good diversifier for BOLD?
Reasonably. At 0.46, BOLD and SLN keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.46 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/bold-vs-sln.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bold-vs-sln/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BOLD correlations · SLN correlations
