ARKK vs PCT: Correlation
How closely do ARK Innovation ETF (ARKK) and PureCycle Technologies, Inc. (PCT) trade together? Their weekly returns over three years give a correlation of 0.40, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARKK and PCT?
Across a 3-year window, the weekly returns of ARKK and PCT correlate at 0.40, moderate. The relationship has been stable: the 1-year correlation (0.33) sits close to the 3-year figure. Stretching to 5 years gives 0.33, with an annualized covariance of 1506.6 %².
By 3-year correlation, PCT places #105 of the 122 assets tracked against ARKK. The last year tells two different stories: ARKK led by 70.9 percentage points, +15.7% for ARKK against -55.2% for PCT. One caveat on sizing: PCT is 2.5 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 PCT: side by side
| ARKK (ARK Innovation ETF) | PCT (PureCycle Technologies, Inc.) | |
|---|---|---|
| 1-year return | +15.7% | -55.2% |
| 5-year return | -27.7% | -52.3% |
| Volatility (ann.) | 38.8% | 98.0% |
| Beta vs S&P 500 | 2.07 | 2.42 |
| Max drawdown (3Y) | -39.6% | -74.2% |
| Market cap | – | $1.3B |
| P/E (trailing) | – | – |
| Dividend yield | – | 0.00% |
| Sector / category | ETF · Thematic | US Listed |
Year-by-year returns
| Year | ARKK | PCT |
|---|---|---|
| 2022 | -67.0% | -29.4% |
| 2023 | +69.0% | -40.1% |
| 2024 | +8.4% | +153.1% |
| 2025 | +35.5% | -16.2% |
| 2026 | +13.6% | -22.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARKK and PCT good diversifiers for each other?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ARKK and PCT?
Using weekly returns as of 2026-08-27: 0.40 over 3 years, with 0.33 over the last year and 0.33 over 5 years.
Is PCT a good diversifier for ARKK?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.40 mean?
A reading of 0.40 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/arkk-vs-pct.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/arkk-vs-pct/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ARKK correlations · PCT correlations
