ACCO vs IWM: Correlation
Measured on weekly returns over the past three years, Acco Brands Corporation (ACCO) and iShares Russell 2000 ETF (IWM) carry a correlation of 0.64, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACCO and IWM?
Over the past 3 years, ACCO and IWM moved with a correlation of 0.64, which is strong. Little has changed lately, as the 1-year reading of 0.63 lands near the 3-year figure. Over 5 years the correlation is 0.61, and the annualized covariance of weekly returns is 511.2 %².
In ACCO's tracked universe of 22 assets, IWM sits right near the top at #1. Over the last 12 months IWM came out ahead by 10.6 percentage points (+17.8% against +28.4%). Risk is not evenly split, since ACCO carries 2.0 times the volatility of the other side.
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.
ACCO vs IWM: side by side
| ACCO (Acco Brands Corporation) | IWM (iShares Russell 2000 ETF) | |
|---|---|---|
| 1-year return | +17.8% | +28.4% |
| 5-year return | -36.8% | +41.5% |
| Volatility (ann.) | 40.3% | 19.8% |
| Beta vs S&P 500 | 1.19 | 1.06 |
| Max drawdown (3Y) | -50.0% | -27.5% |
| Market cap | $0.4B | – |
| P/E (trailing) | 6.8 | – |
| Dividend yield | 7.16% | 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 | ACCO | IWM |
|---|---|---|
| 2022 | -29.2% | -20.5% |
| 2023 | +15.3% | +16.8% |
| 2024 | -8.7% | +11.4% |
| 2025 | -23.1% | +12.7% |
| 2026 | +22.5% | +22.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACCO and IWM good diversifiers for each other?
To a limited degree. At 0.64 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 ACCO and IWM?
The ACCO/IWM correlation stands at 0.64 on a 3-year window (1 year: 0.63, 5 years: 0.61), computed from weekly returns as of 2026-08-27.
Is IWM a good diversifier for ACCO?
To a limited degree. At 0.64 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 0.64 mean?
A reading of 0.64 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/acco-vs-iwm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/acco-vs-iwm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ACCO correlations · IWM correlations
