BCHT vs KRRO: Correlation
How closely do Birchtech Corp. (BCHT) and Korro Bio, Inc. (KRRO) trade together? Their weekly returns over three years give a correlation of 0.43, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BCHT and KRRO?
On 3 years of weekly data the BCHT/KRRO correlation comes out at 0.43, moderate. The link has loosened recently: the 1-year correlation (0.09) runs below the 3-year figure (0.43). The 5-year figure is 0.33, and annualized covariance runs at 5712.9 %².
Few assets follow BCHT as closely as KRRO, which ranks #1 of 12 tracked partners. Their recent paths diverged sharply: over the last 12 months KRRO outperformed by 16.3 percentage points (-54.9% for BCHT against -38.6% for KRRO). One caveat on sizing: KRRO is 2.1 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.
BCHT vs KRRO: side by side
| BCHT (Birchtech Corp.) | KRRO (Korro Bio, Inc.) | |
|---|---|---|
| 1-year return | -54.9% | -38.6% |
| 5-year return | -67.4% | -96.6% |
| Volatility (ann.) | 80.4% | 166.3% |
| Beta vs S&P 500 | 0.41 | 3.17 |
| Max drawdown (3Y) | -80.2% | -94.1% |
| Market cap | – | $0.2B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BCHT | KRRO |
|---|---|---|
| 2022 | -55.9% | -25.0% |
| 2023 | +253.8% | -75.1% |
| 2024 | -44.6% | -20.6% |
| 2025 | +47.1% | -79.0% |
| 2026 | -66.9% | +65.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BCHT and KRRO good diversifiers for each other?
Reasonably. At 0.43, BCHT and KRRO keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between BCHT and KRRO?
As of 2026-08-27, the correlation of weekly returns between BCHT and KRRO is 0.43 over 3 years, 0.09 over 1 year and 0.33 over 5 years.
Is KRRO a good diversifier for BCHT?
Reasonably. At 0.43, BCHT and KRRO keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.43 mean?
A reading of 0.43 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bcht-vs-krro.json
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[](https://www.pairbook.io/pair/bcht-vs-krro/)
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Related comparisons
Hubs: BCHT correlations · KRRO correlations
