HLLY vs SMP: Correlation
Holley Inc. (HLLY) and Standard Motor Products, Inc. (SMP) show a moderate relationship: their 3-year correlation of weekly returns is 0.57.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are HLLY and SMP?
Across a 3-year window, the weekly returns of HLLY and SMP correlate at 0.57, moderate. The past 12 months show a weaker link (0.39) than the 3-year average (0.57). Stretching to 5 years gives 0.46, with an annualized covariance of 1199.8 %².
Few assets follow HLLY as closely as SMP, which ranks #1 of 18 tracked partners. Their recent paths diverged sharply: over the last 12 months SMP outperformed by 22.7 percentage points (-25.4% for HLLY against -2.7% for SMP). One caveat on sizing: HLLY is 1.7 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
HLLY vs SMP: side by side
| HLLY (Holley Inc.) | SMP (Standard Motor Products, Inc.) | |
|---|---|---|
| 1-year return | -25.4% | -2.7% |
| 5-year return | -74.8% | +1.1% |
| Volatility (ann.) | 60.1% | 35.3% |
| Beta vs S&P 500 | 1.33 | 0.75 |
| Max drawdown (3Y) | -70.2% | -44.8% |
| Market cap | $0.4B | $0.8B |
| P/E (trailing) | 33.0 | 9.4 |
| Dividend yield | 0.00% | 3.50% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | HLLY | SMP |
|---|---|---|
| 2022 | -83.7% | -31.8% |
| 2023 | +129.7% | +18.0% |
| 2024 | -38.0% | -19.4% |
| 2025 | +36.8% | +23.4% |
| 2026 | -28.1% | +3.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are HLLY and SMP good diversifiers for each other?
To a limited degree. At 0.57 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between HLLY and SMP?
The HLLY/SMP correlation stands at 0.57 on a 3-year window (1 year: 0.39, 5 years: 0.46), computed from weekly returns as of 2026-08-27.
Is SMP a good diversifier for HLLY?
To a limited degree. At 0.57 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.57 mean?
A reading of 0.57 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/hlly-vs-smp.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/hlly-vs-smp/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: HLLY correlations · SMP correlations
