AMPL vs CASY: Correlation
How closely do Amplitude, Inc. (AMPL) and Casey's (CASY) trade together? Their weekly returns over three years give a correlation of -0.21, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AMPL and CASY?
Over the past 3 years, AMPL and CASY moved with a correlation of -0.21, which is negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.33 versus -0.21 over 3 years. Over 5 years the correlation is -0.04, and the annualized covariance of weekly returns is -348.3 %².
CASY is close to the least connected end of AMPL's tracked universe, ranking #26 of 29. Their recent paths diverged sharply: over the last 12 months CASY outperformed by 29.0 percentage points (+24.7% for AMPL against +53.7% for CASY). One caveat on sizing: AMPL 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.
AMPL vs CASY: side by side
| AMPL (Amplitude, Inc.) | CASY (Casey's) | |
|---|---|---|
| 1-year return | +24.7% | +53.7% |
| 5-year return | -73.9% | +284.3% |
| Volatility (ann.) | 56.0% | 28.9% |
| Beta vs S&P 500 | 1.42 | 0.39 |
| Max drawdown (3Y) | -61.1% | -16.6% |
| Market cap | $1.9B | $28.2B |
| P/E (trailing) | – | 42.2 |
| Dividend yield | 0.00% | 0.28% |
| Sector / category | US Listed | Consumer Staples |
Year-by-year returns
| Year | AMPL | CASY |
|---|---|---|
| 2022 | -77.2% | +14.5% |
| 2023 | +5.3% | +23.3% |
| 2024 | -17.1% | +45.0% |
| 2025 | +9.8% | +40.1% |
| 2026 | +23.3% | +38.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AMPL and CASY good diversifiers for each other?
Yes. With a correlation of -0.21, AMPL and CASY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between AMPL and CASY?
As of 2026-08-27, the correlation of weekly returns between AMPL and CASY is -0.21 over 3 years, -0.33 over 1 year and -0.04 over 5 years.
Is CASY a good diversifier for AMPL?
Yes. With a correlation of -0.21, AMPL and CASY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.21 mean?
On the −1 to +1 scale, -0.21 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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ampl-vs-casy.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ampl-vs-casy/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: AMPL correlations · CASY correlations
