ARCB vs SAIA: Correlation
Measured on weekly returns over the past three years, ArcBest Corporation (ARCB) and Saia, Inc. (SAIA) carry a correlation of 0.68, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARCB and SAIA?
On 3 years of weekly data the ARCB/SAIA correlation comes out at 0.68, strong. The relationship has been stable: the 1-year correlation (0.75) sits close to the 3-year figure. The 5-year figure is 0.70, and annualized covariance runs at 1586.7 %².
Among the 18 assets we track against ARCB, SAIA ranks #6 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months ARCB outperformed by 73.6 percentage points (+90.2% for ARCB against +16.6% for SAIA).
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.
ARCB vs SAIA: side by side
| ARCB (ArcBest Corporation) | SAIA (Saia, Inc.) | |
|---|---|---|
| 1-year return | +90.2% | +16.6% |
| 5-year return | +107.2% | +44.1% |
| Volatility (ann.) | 46.8% | 50.1% |
| Beta vs S&P 500 | 1.33 | 1.25 |
| Max drawdown (3Y) | -62.4% | -60.9% |
| Market cap | $3.1B | $9.4B |
| P/E (trailing) | 198.7 | 33.8 |
| Dividend yield | 0.35% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ARCB | SAIA |
|---|---|---|
| 2022 | -41.2% | -37.8% |
| 2023 | +72.4% | +109.0% |
| 2024 | -22.1% | +4.0% |
| 2025 | -20.0% | -28.4% |
| 2026 | +88.1% | +8.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARCB and SAIA good diversifiers for each other?
Somewhat, no more. With 0.68 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between ARCB and SAIA?
Using weekly returns as of 2026-08-27: 0.68 over 3 years, with 0.75 over the last year and 0.70 over 5 years.
Is SAIA a good diversifier for ARCB?
Somewhat, no more. With 0.68 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.68 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/arcb-vs-saia.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/arcb-vs-saia/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ARCB correlations · SAIA correlations
