CBT vs IWM: Correlation
Cabot Corporation (CBT) and iShares Russell 2000 ETF (IWM) show a strong relationship: their 3-year correlation of weekly returns is 0.60.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CBT and IWM?
On 3 years of weekly data the CBT/IWM correlation comes out at 0.60, strong. Little has changed lately, as the 1-year reading of 0.55 lands near the 3-year figure. The 5-year figure is 0.65, and annualized covariance runs at 341.1 %².
Among the 15 assets we track against CBT, IWM ranks #5 by 3-year correlation. The last year tells two different stories: IWM led by 22.7 percentage points, +5.7% for CBT against +28.4% for IWM.
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 IWM: side by side
| CBT (Cabot Corporation) | IWM (iShares Russell 2000 ETF) | |
|---|---|---|
| 1-year return | +5.7% | +28.4% |
| 5-year return | +73.1% | +41.5% |
| Volatility (ann.) | 28.5% | 19.8% |
| Beta vs S&P 500 | 0.84 | 1.06 |
| Max drawdown (3Y) | -48.8% | -27.5% |
| Market cap | $4.4B | – |
| P/E (trailing) | 23.7 | – |
| Dividend yield | 2.16% | 0.91% |
| Expense ratio | – | 0.19% |
| Assets under management | – | $80.1B |
| Sector / category | US Listed | ETF · US Small & Mid Cap |
IWM, iShares's Small Blend fund, carries $80.1B under management, 1757 holdings, a 0.19% expense ratio, a 0.91% trailing dividend yield.
Year-by-year returns
| Year | CBT | IWM |
|---|---|---|
| 2022 | +21.4% | -20.5% |
| 2023 | +27.6% | +16.8% |
| 2024 | +11.3% | +11.4% |
| 2025 | -25.7% | +12.7% |
| 2026 | +29.1% | +22.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
Keep in mind that IWM holds CBT at a 0.14% weight, which makes a slice of this correlation mechanical rather than coincidental.
Are CBT and IWM good diversifiers for each other?
To a limited degree. At 0.60 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between CBT and IWM?
As of 2026-08-27, the correlation of weekly returns between CBT and IWM is 0.60 over 3 years, 0.55 over 1 year and 0.65 over 5 years.
Is IWM a good diversifier for CBT?
To a limited degree. At 0.60 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.60 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-iwm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cbt-vs-iwm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CBT correlations · IWM correlations
