DAL vs PH: Correlation
Measured on weekly returns over the past three years, Delta Air Lines (DAL) and Parker Hannifin (PH) carry a correlation of 0.48, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DAL and PH?
On 3 years of weekly data the DAL/PH correlation comes out at 0.48, moderate. The past 12 months show a weaker link (0.36) than the 3-year average (0.48). The 5-year figure is 0.56, and annualized covariance runs at 470.0 %².
Among the 33 assets we track against DAL, PH ranks #19 by 3-year correlation. Neither side won the trailing year by much: +33.9% against +32.8%. On a rolling one-year basis the correlation drifted between 0.25 and 0.68, a moderate band.
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.
DAL vs PH: side by side
| DAL (Delta Air Lines) | PH (Parker Hannifin) | |
|---|---|---|
| 1-year return | +33.9% | +32.8% |
| 5-year return | +110.6% | +256.4% |
| Volatility (ann.) | 37.1% | 26.6% |
| Beta vs S&P 500 | 1.17 | 1.16 |
| Max drawdown (3Y) | -47.9% | -26.8% |
| Market cap | – | $127.5B |
| P/E (trailing) | 13.8 | 36.5 |
| Dividend yield | 0.94% | 0.71% |
| Sector / category | Industrials | Industrials |
Year-by-year returns
| Year | DAL | PH |
|---|---|---|
| 2022 | -15.9% | -6.9% |
| 2023 | +23.0% | +60.8% |
| 2024 | +52.0% | +39.6% |
| 2025 | +16.1% | +39.5% |
| 2026 | +17.8% | +15.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DAL and PH good diversifiers for each other?
Reasonably. At 0.48, DAL and PH keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between DAL and PH?
As of 2026-08-27, the correlation of weekly returns between DAL and PH is 0.48 over 3 years, 0.36 over 1 year and 0.56 over 5 years.
Is PH a good diversifier for DAL?
Reasonably. At 0.48, DAL and PH keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.48 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/dal-vs-ph.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/dal-vs-ph/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: DAL correlations · PH correlations
