FUL vs IOSP: Correlation
Measured on weekly returns over the past three years, H. B. Fuller Company (FUL) and Innospec Inc. (IOSP) carry a correlation of 0.67, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FUL and IOSP?
On 3 years of weekly data the FUL/IOSP correlation comes out at 0.67, strong. Recent behaviour matches the longer record: 0.75 over 1 year against 0.67 over 3. The 5-year figure is 0.63, and annualized covariance runs at 550.0 %².
IOSP is one of the assets that tracks FUL most closely: it ranks #3 out of the 16 assets we track against FUL. Their recent paths diverged sharply: over the last 12 months IOSP outperformed by 17.4 percentage points (-6.1% for FUL against +11.3% for IOSP).
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.
FUL vs IOSP: side by side
| FUL (H. B. Fuller Company) | IOSP (Innospec Inc.) | |
|---|---|---|
| 1-year return | -6.1% | +11.3% |
| 5-year return | -10.4% | +10.2% |
| Volatility (ann.) | 31.0% | 26.6% |
| Beta vs S&P 500 | 0.93 | 0.94 |
| Max drawdown (3Y) | -43.5% | -48.4% |
| Market cap | $3.1B | $2.3B |
| P/E (trailing) | 17.2 | 19.5 |
| Dividend yield | 1.64% | 1.87% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | FUL | IOSP |
|---|---|---|
| 2022 | -10.6% | +15.2% |
| 2023 | +15.0% | +21.5% |
| 2024 | -16.2% | -9.6% |
| 2025 | -10.5% | -28.9% |
| 2026 | -3.0% | +26.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FUL and IOSP good diversifiers for each other?
Somewhat, no more. With 0.67 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between FUL and IOSP?
As of 2026-08-27, the correlation of weekly returns between FUL and IOSP is 0.67 over 3 years, 0.75 over 1 year and 0.63 over 5 years.
Is IOSP a good diversifier for FUL?
Somewhat, no more. With 0.67 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.67 mean?
A reading of 0.67 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/ful-vs-iosp.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ful-vs-iosp/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: FUL correlations · IOSP correlations
