EOI vs PTC: Correlation
How closely do Eaton Vance Enhance Equity Income Fund Eaton Vance Enhanced (EOI) and PTC Inc. (PTC) trade together? Their weekly returns over three years give a correlation of 0.52, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EOI and PTC?
Across a 3-year window, the weekly returns of EOI and PTC correlate at 0.52, moderate. The past 12 months show a weaker link (0.37) than the 3-year average (0.52). Stretching to 5 years gives 0.51, with an annualized covariance of 252.9 %².
By 3-year correlation, PTC places #10 of the 19 assets tracked against EOI. Their recent paths diverged sharply: over the last 12 months EOI outperformed by 28.8 percentage points (+2.2% for EOI against -26.6% for PTC). Note the risk asymmetry: PTC runs 1.7 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
EOI vs PTC: side by side
| EOI (Eaton Vance Enhance Equity Income Fund Eaton Vance Enhanced) | PTC (PTC Inc.) | |
|---|---|---|
| 1-year return | +2.2% | -26.6% |
| 5-year return | +55.4% | +20.0% |
| Volatility (ann.) | 17.0% | 28.8% |
| Beta vs S&P 500 | 0.96 | 1.02 |
| Max drawdown (3Y) | -23.2% | -48.1% |
| Market cap | $0.8B | $17.2B |
| P/E (trailing) | 8.5 | 14.7 |
| Dividend yield | 8.03% | 0.00% |
| Sector / category | US Listed | Information Technology |
Year-by-year returns
| Year | EOI | PTC |
|---|---|---|
| 2022 | -19.7% | -0.9% |
| 2023 | +20.7% | +45.8% |
| 2024 | +35.8% | +5.1% |
| 2025 | +7.2% | -5.3% |
| 2026 | +3.4% | -8.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EOI and PTC good diversifiers for each other?
Only partially. A correlation of 0.52 means EOI and PTC share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between EOI and PTC?
The EOI/PTC correlation stands at 0.52 on a 3-year window (1 year: 0.37, 5 years: 0.51), computed from weekly returns as of 2026-08-27.
Is PTC a good diversifier for EOI?
Only partially. A correlation of 0.52 means EOI and PTC share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.52 mean?
On the −1 to +1 scale, 0.52 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/eoi-vs-ptc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/eoi-vs-ptc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: EOI correlations · PTC correlations
