POCI vs ZCMD: Correlation
Precision Optics Corporation, Inc. (POCI) and Zhongchao Inc. - Class A (ZCMD) show a negative relationship: their 3-year correlation of weekly returns is -0.26.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are POCI and ZCMD?
Over the past 3 years, POCI and ZCMD moved with a correlation of -0.26, which is negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.32 lands near the 3-year figure. Over 5 years the correlation is -0.16, and the annualized covariance of weekly returns is -1544.9 %².
Out of 10 assets tracked against POCI, ZCMD lands near the bottom at #9. Their recent paths diverged sharply: over the last 12 months POCI outperformed by 89.2 percentage points (-10.7% for POCI against -99.9% for ZCMD). Risk is not evenly split, since ZCMD carries 3.3 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.
POCI vs ZCMD: side by side
| POCI (Precision Optics Corporation, Inc.) | ZCMD (Zhongchao Inc. - Class A) | |
|---|---|---|
| 1-year return | -10.7% | -99.9% |
| 5-year return | -21.9% | -100.0% |
| Volatility (ann.) | 42.5% | 141.8% |
| Beta vs S&P 500 | 0.45 | 0.59 |
| Max drawdown (3Y) | -45.4% | -100.0% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | POCI | ZCMD |
|---|---|---|
| 2022 | -22.6% | -35.4% |
| 2023 | +8.1% | -69.5% |
| 2024 | -19.9% | -53.8% |
| 2025 | -13.1% | -72.2% |
| 2026 | +5.7% | -99.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are POCI and ZCMD good diversifiers for each other?
By historical standards, yes. A correlation of -0.26 means the two rarely move for the same reasons.
FAQ
What is the correlation between POCI and ZCMD?
The POCI/ZCMD correlation stands at -0.26 on a 3-year window (1 year: -0.32, 5 years: -0.16), computed from weekly returns as of 2026-08-27.
Is ZCMD a good diversifier for POCI?
By historical standards, yes. A correlation of -0.26 means the two rarely move for the same reasons.
What does a correlation of -0.26 mean?
A reading of -0.26 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/poci-vs-zcmd.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/poci-vs-zcmd/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: POCI correlations · ZCMD correlations
