MAS vs ROCK: Correlation
How closely do Masco (MAS) and Gibraltar Industries, Inc. (ROCK) trade together? Their weekly returns over three years give a correlation of 0.64, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MAS and ROCK?
On 3 years of weekly data the MAS/ROCK correlation comes out at 0.64, strong. Recent behaviour matches the longer record: 0.63 over 1 year against 0.64 over 3. The 5-year figure is 0.57, and annualized covariance runs at 743.1 %².
Among the 61 assets we track against MAS, ROCK ranks #28 by 3-year correlation. Correlation aside, the last 12 months split them widely, with MAS ahead by 28.5 points (-0.5% versus -29.0%).
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.
MAS vs ROCK: side by side
| MAS (Masco) | ROCK (Gibraltar Industries, Inc.) | |
|---|---|---|
| 1-year return | -0.5% | -29.0% |
| 5-year return | +29.1% | -39.2% |
| Volatility (ann.) | 29.6% | 39.2% |
| Beta vs S&P 500 | 0.95 | 1.19 |
| Max drawdown (3Y) | -30.9% | -61.2% |
| Market cap | $14.4B | $1.4B |
| P/E (trailing) | 17.0 | 22.9 |
| Dividend yield | 1.71% | 0.00% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | MAS | ROCK |
|---|---|---|
| 2022 | -32.1% | -31.2% |
| 2023 | +46.6% | +72.1% |
| 2024 | +10.0% | -25.4% |
| 2025 | -10.9% | -16.1% |
| 2026 | +16.3% | -7.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MAS and ROCK good diversifiers for each other?
Only partially. A correlation of 0.64 means MAS and ROCK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between MAS and ROCK?
Using weekly returns as of 2026-08-27: 0.64 over 3 years, with 0.63 over the last year and 0.57 over 5 years.
Is ROCK a good diversifier for MAS?
Only partially. A correlation of 0.64 means MAS and ROCK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.64 mean?
On the −1 to +1 scale, 0.64 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/mas-vs-rock.json
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Related comparisons
Hubs: MAS correlations · ROCK correlations
