IOSP vs VHI: Correlation
Measured on weekly returns over the past three years, Innospec Inc. (IOSP) and Valhi, Inc. (VHI) carry a correlation of 0.48, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IOSP and VHI?
Over the past 3 years, IOSP and VHI moved with a correlation of 0.48, which is moderate. The link has tightened recently: the 1-year correlation (0.61) runs above the 3-year figure (0.48). Over 5 years the correlation is 0.44, and the annualized covariance of weekly returns is 755.8 %².
By 3-year correlation, VHI places #28 of the 35 assets tracked against IOSP. Their 12-month results are close: +11.3% for IOSP against +7.1% for VHI. One caveat on sizing: VHI is 2.2 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.
IOSP vs VHI: side by side
| IOSP (Innospec Inc.) | VHI (Valhi, Inc.) | |
|---|---|---|
| 1-year return | +11.3% | +7.1% |
| 5-year return | +10.2% | -14.8% |
| Volatility (ann.) | 26.6% | 59.4% |
| Beta vs S&P 500 | 0.94 | 1.08 |
| Max drawdown (3Y) | -48.4% | -71.3% |
| Market cap | $2.3B | $0.5B |
| P/E (trailing) | 19.5 | – |
| Dividend yield | 1.87% | 1.74% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | IOSP | VHI |
|---|---|---|
| 2022 | +15.2% | -22.7% |
| 2023 | +21.5% | -29.4% |
| 2024 | -9.6% | +56.5% |
| 2025 | -28.9% | -47.4% |
| 2026 | +26.0% | +49.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IOSP and VHI good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between IOSP and VHI?
Using weekly returns as of 2026-08-27: 0.48 over 3 years, with 0.61 over the last year and 0.44 over 5 years.
Is VHI a good diversifier for IOSP?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.48 mean?
On the −1 to +1 scale, 0.48 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/iosp-vs-vhi.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/iosp-vs-vhi/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IOSP correlations · VHI correlations
