BLDR vs CPRT: Correlation
How closely do Builders FirstSource (BLDR) and Copart (CPRT) trade together? Their weekly returns over three years give a correlation of 0.40, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BLDR and CPRT?
On 3 years of weekly data the BLDR/CPRT correlation comes out at 0.40, moderate. Recent behaviour matches the longer record: 0.33 over 1 year against 0.40 over 3. The 5-year figure is 0.45, and annualized covariance runs at 477.8 %².
Within BLDR's tracked universe of 48 assets, CPRT comes in at #37 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months CPRT outperformed by 20.0 percentage points (-52.6% for BLDR against -32.6% for CPRT). The rolling one-year correlation stayed in a tight band between 0.31 and 0.53 over the past three years, which points to a structural rather than episodic relationship. One caveat on sizing: BLDR is 1.8 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.
BLDR vs CPRT: side by side
| BLDR (Builders FirstSource) | CPRT (Copart) | |
|---|---|---|
| 1-year return | -52.6% | -32.6% |
| 5-year return | +25.8% | -9.3% |
| Volatility (ann.) | 45.6% | 26.0% |
| Beta vs S&P 500 | 1.36 | 0.86 |
| Max drawdown (3Y) | -68.7% | -57.4% |
| Market cap | $7.2B | $30.3B |
| P/E (trailing) | 74.7 | 20.2 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Industrials | Industrials |
Year-by-year returns
| Year | BLDR | CPRT |
|---|---|---|
| 2022 | -24.3% | -19.7% |
| 2023 | +157.3% | +60.9% |
| 2024 | -14.4% | +17.1% |
| 2025 | -28.0% | -31.8% |
| 2026 | -34.7% | -16.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BLDR and CPRT good diversifiers for each other?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between BLDR and CPRT?
The BLDR/CPRT correlation stands at 0.40 on a 3-year window (1 year: 0.33, 5 years: 0.45), computed from weekly returns as of 2026-08-27.
Is CPRT a good diversifier for BLDR?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.40 mean?
On the −1 to +1 scale, 0.40 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/bldr-vs-cprt.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/bldr-vs-cprt/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BLDR correlations · CPRT correlations
