EGHT vs POCI: Correlation
How closely do 8x8 Inc (EGHT) and Precision Optics Corporation, Inc. (POCI) trade together? Their weekly returns over three years give a correlation of 0.31, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EGHT and POCI?
On 3 years of weekly data the EGHT/POCI correlation comes out at 0.31, moderate. Little has changed lately, as the 1-year reading of 0.24 lands near the 3-year figure. The 5-year figure is 0.27, and annualized covariance runs at 1063.5 %².
Out of 15 assets tracked against EGHT, POCI lands near the bottom at #11. Correlation aside, the last 12 months split them widely, with EGHT ahead by 15.9 points (+5.2% versus -10.7%). One caveat on sizing: EGHT 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.
EGHT vs POCI: side by side
| EGHT (8x8 Inc) | POCI (Precision Optics Corporation, Inc.) | |
|---|---|---|
| 1-year return | +5.2% | -10.7% |
| 5-year return | -91.6% | -21.9% |
| Volatility (ann.) | 80.2% | 42.5% |
| Beta vs S&P 500 | 2.07 | 0.45 |
| Max drawdown (3Y) | -59.5% | -45.4% |
| Market cap | $0.3B | – |
| P/E (trailing) | 67.0 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | EGHT | POCI |
|---|---|---|
| 2022 | -74.2% | -22.6% |
| 2023 | -12.5% | +8.1% |
| 2024 | -29.4% | -19.9% |
| 2025 | -26.2% | -13.1% |
| 2026 | +2.0% | +5.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EGHT and POCI good diversifiers for each other?
Reasonably. At 0.31, EGHT and POCI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between EGHT and POCI?
Using weekly returns as of 2026-08-27: 0.31 over 3 years, with 0.24 over the last year and 0.27 over 5 years.
Is POCI a good diversifier for EGHT?
Reasonably. At 0.31, EGHT and POCI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.31 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/eght-vs-poci.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/eght-vs-poci/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: EGHT correlations · POCI correlations
