BLDR vs OC: Correlation
How closely do Builders FirstSource (BLDR) and Owens Corning Inc (OC) trade together? Their weekly returns over three years give a correlation of 0.70, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BLDR and OC?
On 3 years of weekly data the BLDR/OC correlation comes out at 0.70, strong. Recent behaviour matches the longer record: 0.68 over 1 year against 0.70 over 3. The 5-year figure is 0.67, and annualized covariance runs at 1118.0 %².
By 3-year correlation, OC places #17 of the 48 assets tracked against BLDR. Correlation aside, the last 12 months split them widely, with OC ahead by 49.0 points (-52.6% versus -3.6%).
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 OC: side by side
| BLDR (Builders FirstSource) | OC (Owens Corning Inc) | |
|---|---|---|
| 1-year return | -52.6% | -3.6% |
| 5-year return | +25.8% | +60.3% |
| Volatility (ann.) | 45.6% | 35.1% |
| Beta vs S&P 500 | 1.36 | 1.41 |
| Max drawdown (3Y) | -68.7% | -52.5% |
| Market cap | $7.2B | $11.4B |
| P/E (trailing) | 74.7 | – |
| Dividend yield | 0.00% | 2.10% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | BLDR | OC |
|---|---|---|
| 2022 | -24.3% | -4.2% |
| 2023 | +157.3% | +77.2% |
| 2024 | -14.4% | +16.6% |
| 2025 | -28.0% | -33.0% |
| 2026 | -34.7% | +30.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BLDR and OC good diversifiers for each other?
Somewhat, no more. With 0.70 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between BLDR and OC?
The BLDR/OC correlation stands at 0.70 on a 3-year window (1 year: 0.68, 5 years: 0.67), computed from weekly returns as of 2026-08-27.
Is OC a good diversifier for BLDR?
Somewhat, no more. With 0.70 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.70 mean?
A reading of 0.70 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/bldr-vs-oc.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bldr-vs-oc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BLDR correlations · OC correlations
