ARKK vs ATOS: Correlation
How closely do ARK Innovation ETF (ARKK) and Atossa Therapeutics, Inc. (ATOS) 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 ARKK and ATOS?
On 3 years of weekly data the ARKK/ATOS correlation comes out at 0.43, moderate. The relationship has been stable: the 1-year correlation (0.42) sits close to the 3-year figure. The 5-year figure is 0.46, and annualized covariance runs at 1231.1 %².
Within ARKK's tracked universe of 122 assets, ATOS comes in at #96 by 3-year correlation. Correlation aside, the last 12 months split them widely, with ARKK ahead by 92.5 points (+15.7% versus -76.8%). One caveat on sizing: ATOS is 1.9 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 ATOS: side by side
| ARKK (ARK Innovation ETF) | ATOS (Atossa Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | +15.7% | -76.8% |
| 5-year return | -27.7% | -95.0% |
| Volatility (ann.) | 38.8% | 73.3% |
| Beta vs S&P 500 | 2.07 | 1.97 |
| Max drawdown (3Y) | -39.6% | -94.4% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | – | 0.00% |
| Sector / category | ETF · Thematic | US Listed |
Year-by-year returns
| Year | ARKK | ATOS |
|---|---|---|
| 2022 | -67.0% | -66.9% |
| 2023 | +69.0% | +66.0% |
| 2024 | +8.4% | +6.8% |
| 2025 | +35.5% | -37.2% |
| 2026 | +13.6% | -70.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARKK and ATOS good diversifiers for each other?
A fair diversifier. At 0.43, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ARKK and ATOS?
The ARKK/ATOS correlation stands at 0.43 on a 3-year window (1 year: 0.42, 5 years: 0.46), computed from weekly returns as of 2026-08-27.
Is ATOS a good diversifier for ARKK?
A fair diversifier. At 0.43, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.43 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.
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Related comparisons
Hubs: ARKK correlations · ATOS correlations
