ARKK vs DUOL: Correlation
Measured on weekly returns over the past three years, ARK Innovation ETF (ARKK) and Duolingo, Inc. (DUOL) carry a correlation of 0.44, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARKK and DUOL?
Across a 3-year window, the weekly returns of ARKK and DUOL correlate at 0.44, moderate. Recent behaviour matches the longer record: 0.41 over 1 year against 0.44 over 3. Stretching to 5 years gives 0.47, with an annualized covariance of 1053.0 %².
By 3-year correlation, DUOL places #92 of the 122 assets tracked against ARKK. Their recent paths diverged sharply: over the last 12 months ARKK outperformed by 70.8 percentage points (+15.7% for ARKK against -55.1% for DUOL). Note the risk asymmetry: DUOL runs 1.6 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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 DUOL: side by side
| ARKK (ARK Innovation ETF) | DUOL (Duolingo, Inc.) | |
|---|---|---|
| 1-year return | +15.7% | -55.1% |
| 5-year return | -27.7% | +11.0% |
| Volatility (ann.) | 38.8% | 62.1% |
| Beta vs S&P 500 | 2.07 | 1.55 |
| Max drawdown (3Y) | -39.6% | -83.3% |
| Market cap | – | $6.7B |
| P/E (trailing) | – | 16.6 |
| Dividend yield | – | 0.00% |
| Sector / category | ETF · Thematic | US Listed |
Year-by-year returns
| Year | ARKK | DUOL |
|---|---|---|
| 2022 | -67.0% | -33.0% |
| 2023 | +69.0% | +218.9% |
| 2024 | +8.4% | +42.9% |
| 2025 | +35.5% | -45.9% |
| 2026 | +13.6% | -18.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARKK and DUOL good diversifiers for each other?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ARKK and DUOL?
The ARKK/DUOL correlation stands at 0.44 on a 3-year window (1 year: 0.41, 5 years: 0.47), computed from weekly returns as of 2026-08-27.
Is DUOL a good diversifier for ARKK?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.44 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-duol.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/arkk-vs-duol/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ARKK correlations · DUOL correlations
