OCC vs PTC: Correlation
Measured on weekly returns over the past three years, Optical Cable Corporation (OCC) and PTC Inc. (PTC) carry a correlation of -0.19, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are OCC and PTC?
Over the past 3 years, OCC and PTC moved with a correlation of -0.19, which is negative, meaning they tend to move in opposite directions. The link has loosened recently: the 1-year correlation (-0.48) runs below the 3-year figure (-0.19). Over 5 years the correlation is -0.11, and the annualized covariance of weekly returns is -573.5 %².
Within OCC's tracked universe of 20 assets, PTC comes in at #10 by 3-year correlation. Correlation aside, the last 12 months split them widely, with OCC ahead by 144.2 points (+117.6% versus -26.6%). Risk is not evenly split, since OCC carries 3.7 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.
OCC vs PTC: side by side
| OCC (Optical Cable Corporation) | PTC (PTC Inc.) | |
|---|---|---|
| 1-year return | +117.6% | -26.6% |
| 5-year return | +297.7% | +20.0% |
| Volatility (ann.) | 105.3% | 28.8% |
| Beta vs S&P 500 | 1.07 | 1.02 |
| Max drawdown (3Y) | -61.1% | -48.1% |
| Market cap | $0.1B | $17.2B |
| P/E (trailing) | 106.5 | 14.7 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | Information Technology |
Year-by-year returns
| Year | OCC | PTC |
|---|---|---|
| 2022 | -17.7% | -0.9% |
| 2023 | -38.9% | +45.8% |
| 2024 | +33.7% | +5.1% |
| 2025 | +23.3% | -5.3% |
| 2026 | +211.0% | -8.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are OCC and PTC good diversifiers for each other?
Yes. With a correlation of -0.19, OCC and PTC have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between OCC and PTC?
Using weekly returns as of 2026-08-27: -0.19 over 3 years, with -0.48 over the last year and -0.11 over 5 years.
Is PTC a good diversifier for OCC?
Yes. With a correlation of -0.19, OCC and PTC have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.19 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/occ-vs-ptc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/occ-vs-ptc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: OCC correlations · PTC correlations
