ESOA vs PBK: Correlation
How closely do Energy Services of America Corporation (ESOA) and PowerBank Corporation (PBK) trade together? Their weekly returns over three years give a correlation of -0.26, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ESOA and PBK?
Across a 3-year window, the weekly returns of ESOA and PBK correlate at -0.26, negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.37 versus -0.26 over 3 years. Stretching to 5 years gives n/a, with an annualized covariance of -1652.5 %².
Among the 11 assets we track against ESOA, PBK sits near the bottom by co-movement, at rank #11. Correlation aside, the last 12 months split them widely, with ESOA ahead by 92.7 points (+14.0% versus -78.7%).
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.
ESOA vs PBK: side by side
| ESOA (Energy Services of America Corporation) | PBK (PowerBank Corporation) | |
|---|---|---|
| 1-year return | +14.0% | -78.7% |
| 5-year return | +517.2% | n/a |
| Volatility (ann.) | 70.1% | 96.0% |
| Beta vs S&P 500 | 0.86 | 0.19 |
| Max drawdown (3Y) | -57.4% | -93.7% |
| Market cap | $0.2B | – |
| P/E (trailing) | 19.1 | – |
| Dividend yield | 1.13% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ESOA | PBK |
|---|---|---|
| 2022 | -22.1% | – |
| 2023 | +141.3% | – |
| 2024 | +111.4% | – |
| 2025 | -34.4% | -11.7% |
| 2026 | +43.6% | -75.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ESOA and PBK good diversifiers for each other?
Yes: at -0.26, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between ESOA and PBK?
The ESOA/PBK correlation stands at -0.26 on a 3-year window (1 year: -0.37, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is PBK a good diversifier for ESOA?
Yes: at -0.26, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.26 mean?
On the −1 to +1 scale, -0.26 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/esoa-vs-pbk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/esoa-vs-pbk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ESOA correlations · PBK correlations
