ARKK vs RKLB: Correlation
ARK Innovation ETF (ARKK) and Rocket Lab Corporation (RKLB) show a moderate relationship: their 3-year correlation of weekly returns is 0.55.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARKK and RKLB?
Over the past 3 years, ARKK and RKLB moved with a correlation of 0.55, which is moderate. The relationship has been stable: the 1-year correlation (0.56) sits close to the 3-year figure. Over 5 years the correlation is 0.54, and the annualized covariance of weekly returns is 1810.7 %².
Within ARKK's tracked universe of 122 assets, RKLB comes in at #48 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months RKLB outperformed by 30.3 percentage points (+15.7% for ARKK against +46.0% for RKLB). One caveat on sizing: RKLB is 2.2 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.
ARKK vs RKLB: side by side
| ARKK (ARK Innovation ETF) | RKLB (Rocket Lab Corporation) | |
|---|---|---|
| 1-year return | +15.7% | +46.0% |
| 5-year return | -27.7% | +573.3% |
| Volatility (ann.) | 38.8% | 85.6% |
| Beta vs S&P 500 | 2.07 | 2.58 |
| Max drawdown (3Y) | -39.6% | -61.0% |
| Market cap | – | $43.2B |
| P/E (trailing) | – | – |
| Dividend yield | – | 0.00% |
| Sector / category | ETF · Thematic | US Listed |
Year-by-year returns
| Year | ARKK | RKLB |
|---|---|---|
| 2022 | -67.0% | -69.3% |
| 2023 | +69.0% | +46.7% |
| 2024 | +8.4% | +360.6% |
| 2025 | +35.5% | +173.9% |
| 2026 | +13.6% | -3.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARKK and RKLB good diversifiers for each other?
To a limited degree. At 0.55 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between ARKK and RKLB?
Using weekly returns as of 2026-08-27: 0.55 over 3 years, with 0.56 over the last year and 0.54 over 5 years.
Is RKLB a good diversifier for ARKK?
To a limited degree. At 0.55 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.55 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/arkk-vs-rklb.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/arkk-vs-rklb/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ARKK correlations · RKLB correlations
