CBT vs IOSP: Correlation
How closely do Cabot Corporation (CBT) and Innospec Inc. (IOSP) trade together? Their weekly returns over three years give a correlation of 0.61, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CBT and IOSP?
On 3 years of weekly data the CBT/IOSP correlation comes out at 0.61, strong. The relationship has been stable: the 1-year correlation (0.56) sits close to the 3-year figure. The 5-year figure is 0.62, and annualized covariance runs at 459.6 %².
In CBT's tracked universe of 15 assets, IOSP sits right near the top at #3. Over the last 12 months IOSP came out ahead by 5.6 percentage points (+5.7% against +11.3%).
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.
CBT vs IOSP: side by side
| CBT (Cabot Corporation) | IOSP (Innospec Inc.) | |
|---|---|---|
| 1-year return | +5.7% | +11.3% |
| 5-year return | +73.1% | +10.2% |
| Volatility (ann.) | 28.5% | 26.6% |
| Beta vs S&P 500 | 0.84 | 0.94 |
| Max drawdown (3Y) | -48.8% | -48.4% |
| Market cap | $4.4B | $2.3B |
| P/E (trailing) | 23.7 | 19.5 |
| Dividend yield | 2.16% | 1.87% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CBT | IOSP |
|---|---|---|
| 2022 | +21.4% | +15.2% |
| 2023 | +27.6% | +21.5% |
| 2024 | +11.3% | -9.6% |
| 2025 | -25.7% | -28.9% |
| 2026 | +29.1% | +26.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CBT and IOSP good diversifiers for each other?
Somewhat, no more. With 0.61 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between CBT and IOSP?
As of 2026-08-27, the correlation of weekly returns between CBT and IOSP is 0.61 over 3 years, 0.56 over 1 year and 0.62 over 5 years.
Is IOSP a good diversifier for CBT?
Somewhat, no more. With 0.61 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.61 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/cbt-vs-iosp.json
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Related comparisons
Hubs: CBT correlations · IOSP correlations
