DCTH vs IWM: Correlation
How closely do Delcath Systems, Inc. (DCTH) and iShares Russell 2000 ETF (IWM) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DCTH and IWM?
Across a 3-year window, the weekly returns of DCTH and IWM correlate at 0.39, moderate. Lately the two have moved closer together, with the 1-year correlation at 0.51 versus 0.39 over 3 years. Stretching to 5 years gives 0.28, with an annualized covariance of 514.0 %².
Few assets follow DCTH as closely as IWM, which ranks #3 of 10 tracked partners. Their recent paths diverged sharply: over the last 12 months DCTH outperformed by 21.4 percentage points (+49.8% for DCTH against +28.4% for IWM). Note the risk asymmetry: DCTH runs 3.3 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.
DCTH vs IWM: side by side
| DCTH (Delcath Systems, Inc.) | IWM (iShares Russell 2000 ETF) | |
|---|---|---|
| 1-year return | +49.8% | +28.4% |
| 5-year return | +80.7% | +41.5% |
| Volatility (ann.) | 65.8% | 19.8% |
| Beta vs S&P 500 | 1.51 | 1.06 |
| Max drawdown (3Y) | -54.8% | -27.5% |
| Market cap | $0.6B | – |
| P/E (trailing) | 1639.0 | – |
| Dividend yield | 0.00% | 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 | DCTH | IWM |
|---|---|---|
| 2022 | -53.5% | -20.5% |
| 2023 | +15.6% | +16.8% |
| 2024 | +189.4% | +11.4% |
| 2025 | -16.1% | +12.7% |
| 2026 | +62.3% | +22.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DCTH and IWM good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between DCTH and IWM?
The DCTH/IWM correlation stands at 0.39 on a 3-year window (1 year: 0.51, 5 years: 0.28), computed from weekly returns as of 2026-08-27.
Is IWM a good diversifier for DCTH?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.39 mean?
A reading of 0.39 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/dcth-vs-iwm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/dcth-vs-iwm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: DCTH correlations · IWM correlations
