ARKK vs ROKU: Correlation
Measured on weekly returns over the past three years, ARK Innovation ETF (ARKK) and Roku, Inc. (ROKU) carry a correlation of 0.72, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARKK and ROKU?
On 3 years of weekly data the ARKK/ROKU correlation comes out at 0.72, strong. The link has loosened recently: the 1-year correlation (0.59) runs below the 3-year figure (0.72). The 5-year figure is 0.76, and annualized covariance runs at 1665.2 %².
Among the 122 assets we track against ARKK, ROKU ranks #17 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months ROKU outperformed by 46.8 percentage points (+15.7% for ARKK against +62.5% for ROKU). One caveat on sizing: ROKU is 1.5 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 ROKU: side by side
| ARKK (ARK Innovation ETF) | ROKU (Roku, Inc.) | |
|---|---|---|
| 1-year return | +15.7% | +62.5% |
| 5-year return | -27.7% | -56.1% |
| Volatility (ann.) | 38.8% | 59.9% |
| Beta vs S&P 500 | 2.07 | 2.49 |
| Max drawdown (3Y) | -39.6% | -51.7% |
| Market cap | – | $23.2B |
| P/E (trailing) | – | 67.1 |
| Dividend yield | – | 0.00% |
| Sector / category | ETF · Thematic | US Listed |
Year-by-year returns
| Year | ARKK | ROKU |
|---|---|---|
| 2022 | -67.0% | -82.2% |
| 2023 | +69.0% | +125.2% |
| 2024 | +8.4% | -18.9% |
| 2025 | +35.5% | +45.9% |
| 2026 | +13.6% | +44.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARKK and ROKU good diversifiers for each other?
Only partially. A correlation of 0.72 means ARKK and ROKU share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between ARKK and ROKU?
The ARKK/ROKU correlation stands at 0.72 on a 3-year window (1 year: 0.59, 5 years: 0.76), computed from weekly returns as of 2026-08-27.
Is ROKU a good diversifier for ARKK?
Only partially. A correlation of 0.72 means ARKK and ROKU share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.72 mean?
A reading of 0.72 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: ARKK correlations · ROKU correlations
