RCKT vs SPRO: Correlation
Rocket Pharmaceuticals, Inc. (RCKT) and Spero Therapeutics, Inc. (SPRO) show a negative relationship: their 3-year correlation of weekly returns is -0.34.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are RCKT and SPRO?
On 3 years of weekly data the RCKT/SPRO correlation comes out at -0.34, negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (0.03) than the 3-year average (-0.34). The 5-year figure is -0.22, and annualized covariance runs at -4285.7 %².
Among the 15 assets we track against RCKT, SPRO sits near the bottom by co-movement, at rank #12. Their recent paths diverged sharply: over the last 12 months RCKT outperformed by 47.9 percentage points (+9.0% for RCKT against -38.9% for SPRO). One caveat on sizing: SPRO is 2.0 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.
RCKT vs SPRO: side by side
| RCKT (Rocket Pharmaceuticals, Inc.) | SPRO (Spero Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | +9.0% | -38.9% |
| 5-year return | -89.2% | -93.3% |
| Volatility (ann.) | 78.7% | 159.8% |
| Beta vs S&P 500 | 1.78 | 1.61 |
| Max drawdown (3Y) | -92.7% | -68.9% |
| Market cap | $0.4B | $0.1B |
| P/E (trailing) | – | 8.6 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | RCKT | SPRO |
|---|---|---|
| 2022 | -10.4% | -89.2% |
| 2023 | +53.1% | -15.0% |
| 2024 | -58.1% | -29.9% |
| 2025 | -72.1% | +126.2% |
| 2026 | +3.1% | -48.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are RCKT and SPRO good diversifiers for each other?
Yes. With a correlation of -0.34, RCKT and SPRO have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between RCKT and SPRO?
The RCKT/SPRO correlation stands at -0.34 on a 3-year window (1 year: 0.03, 5 years: -0.22), computed from weekly returns as of 2026-08-27.
Is SPRO a good diversifier for RCKT?
Yes. With a correlation of -0.34, RCKT and SPRO have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/rckt-vs-spro.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/rckt-vs-spro/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: RCKT correlations · SPRO correlations
