AMPX vs ARKK: Correlation
How closely do Amprius Technologies, Inc. (AMPX) and ARK Innovation ETF (ARKK) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AMPX and ARKK?
Across a 3-year window, the weekly returns of AMPX and ARKK correlate at 0.39, moderate. Recent behaviour matches the longer record: 0.39 over 1 year against 0.39 over 3. Stretching to 5 years gives 0.28, with an annualized covariance of 1700.4 %².
Within AMPX's tracked universe of 15 assets, ARKK comes in at #5 by 3-year correlation. Correlation aside, the last 12 months split them widely, with AMPX ahead by 28.3 points (+44.0% versus +15.7%). Risk is not evenly split, since AMPX carries 2.9 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.
AMPX vs ARKK: side by side
| AMPX (Amprius Technologies, Inc.) | ARKK (ARK Innovation ETF) | |
|---|---|---|
| 1-year return | +44.0% | +15.7% |
| 5-year return | n/a | -27.7% |
| Volatility (ann.) | 111.6% | 38.8% |
| Beta vs S&P 500 | 2.16 | 2.07 |
| Max drawdown (3Y) | -87.3% | -39.6% |
| Market cap | $1.5B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | – |
| Sector / category | US Listed | ETF · Thematic |
Year-by-year returns
| Year | AMPX | ARKK |
|---|---|---|
| 2022 | – | -67.0% |
| 2023 | -33.3% | +69.0% |
| 2024 | -47.1% | +8.4% |
| 2025 | +181.8% | +35.5% |
| 2026 | +33.2% | +13.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AMPX and ARKK good diversifiers for each other?
Reasonably. At 0.39, AMPX and ARKK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between AMPX and ARKK?
As of 2026-08-27, the correlation of weekly returns between AMPX and ARKK is 0.39 over 3 years, 0.39 over 1 year and 0.28 over 5 years.
Is ARKK a good diversifier for AMPX?
Reasonably. At 0.39, AMPX and ARKK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.39 mean?
On the −1 to +1 scale, 0.39 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.
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Related comparisons
Hubs: AMPX correlations · ARKK correlations
