ARKK vs SRTA: Correlation
ARK Innovation ETF (ARKK) and Strata Critical Medical, Inc. (SRTA) show a moderate relationship: their 3-year correlation of weekly returns is 0.44.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARKK and SRTA?
On 3 years of weekly data the ARKK/SRTA correlation comes out at 0.44, moderate. Lately the two have moved closer together, with the 1-year correlation at 0.57 versus 0.44 over 3 years. The 5-year figure is 0.47, and annualized covariance runs at 1203.0 %².
Within ARKK's tracked universe of 122 assets, SRTA comes in at #95 by 3-year correlation. The last year tells two different stories: SRTA led by 19.0 percentage points, +15.7% for ARKK against +34.7% for SRTA. Risk is not evenly split, since SRTA carries 1.8 times the volatility of the other side.
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 SRTA: side by side
| ARKK (ARK Innovation ETF) | SRTA (Strata Critical Medical, Inc.) | |
|---|---|---|
| 1-year return | +15.7% | +34.7% |
| 5-year return | -27.7% | -28.6% |
| Volatility (ann.) | 38.8% | 69.8% |
| Beta vs S&P 500 | 2.07 | 2.02 |
| Max drawdown (3Y) | -39.6% | -48.9% |
| Market cap | – | $0.5B |
| P/E (trailing) | – | – |
| Dividend yield | – | 0.00% |
| Sector / category | ETF · Thematic | US Listed |
Year-by-year returns
| Year | ARKK | SRTA |
|---|---|---|
| 2022 | -67.0% | -59.5% |
| 2023 | +69.0% | -1.4% |
| 2024 | +8.4% | +20.4% |
| 2025 | +35.5% | +13.2% |
| 2026 | +13.6% | +28.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARKK and SRTA good diversifiers for each other?
Reasonably. At 0.44, ARKK and SRTA keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between ARKK and SRTA?
Using weekly returns as of 2026-08-27: 0.44 over 3 years, with 0.57 over the last year and 0.47 over 5 years.
Is SRTA a good diversifier for ARKK?
Reasonably. At 0.44, ARKK and SRTA keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.44 mean?
On the −1 to +1 scale, 0.44 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/arkk-vs-srta.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/arkk-vs-srta/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ARKK correlations · SRTA correlations
