IWM vs KIDS: Correlation
Measured on weekly returns over the past three years, iShares Russell 2000 ETF (IWM) and OrthoPediatrics Corp. (KIDS) carry a correlation of 0.46, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IWM and KIDS?
Over the past 3 years, IWM and KIDS moved with a correlation of 0.46, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.31 versus 0.46 over 3 years. Over 5 years the correlation is 0.51, and the annualized covariance of weekly returns is 430.4 %².
Within IWM's tracked universe of 320 assets, KIDS comes in at #269 by 3-year correlation. Correlation aside, the last 12 months split them widely, with IWM ahead by 20.6 points (+28.4% versus +7.8%). Note the risk asymmetry: KIDS runs 2.4 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
IWM vs KIDS: side by side
| IWM (iShares Russell 2000 ETF) | KIDS (OrthoPediatrics Corp.) | |
|---|---|---|
| 1-year return | +28.4% | +7.8% |
| 5-year return | +41.5% | -65.6% |
| Volatility (ann.) | 19.8% | 47.6% |
| Beta vs S&P 500 | 1.06 | 0.91 |
| Max drawdown (3Y) | -27.5% | -62.1% |
| Market cap | – | $0.6B |
| P/E (trailing) | – | – |
| Dividend yield | 0.91% | 0.00% |
| Expense ratio | 0.19% | – |
| Assets under management | $80.1B | – |
| Sector / category | ETF · US Small & Mid Cap | US Listed |
IWM is a Small Blend fund from iShares: $80.1B under management, 1757 holdings, a 0.19% expense ratio, a 0.91% trailing dividend yield.
Year-by-year returns
| Year | IWM | KIDS |
|---|---|---|
| 2022 | -20.5% | -33.6% |
| 2023 | +16.8% | -18.2% |
| 2024 | +11.4% | -28.7% |
| 2025 | +12.7% | -23.4% |
| 2026 | +22.3% | +31.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IWM and KIDS good diversifiers for each other?
Reasonably. At 0.46, IWM and KIDS keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between IWM and KIDS?
Using weekly returns as of 2026-08-27: 0.46 over 3 years, with 0.31 over the last year and 0.51 over 5 years.
Is KIDS a good diversifier for IWM?
Reasonably. At 0.46, IWM and KIDS keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.46 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/iwm-vs-kids.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/iwm-vs-kids/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: IWM correlations · KIDS correlations
