IWO vs RESM
iShares Russell 2000 Growth ETF against Columbia Research Enhanced Small Cap ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
50%
571 shared positions
Fee gap
8 bp
IWO is cheaper
1-year return gap
—
Larger fund
IWO
$13.9B
Side by side
| IWO | RESM | |
|---|---|---|
| Fund | iShares Russell 2000 Growth ETF | Columbia Research Enhanced Small Cap ETF |
| Issuer | iShares | Columbia |
| Category | Small Cap Growth | Multi-Factor |
| Expense ratio | 0.24% | 0.32% |
| Assets | $13.9B | $3.7M |
| Average daily dollar volume | $168M | $10K |
| Listed | Jul 24, 2000 | Dec 11, 2025 |
| FrenzyCap score | 88 | 41 |
| 1-month return | −2.4% | −1.7% |
| 3-month return | −5.9% | −3.3% |
| Year to date | +10.5% | +16.8% |
| 1-year return | +8.8% | — |
| 30-day volatility | 14.6% | 10.9% |
| Worst drawdown, 1 year | −14.9% | −8.5% |
| Trailing 12-month yield | 0.47% | 0.08% |
| Holdings | 1,130 | 1,040 |
| Top 10 weight | 6.3% | 5.0% |
| Look-through P/E | 1667.5 | 43.0 |
| Holdings vs fair value | +10.2% | +17.5% |
| Holdings above 200-day average | 56% | 52% |
| Net flow, latest 3 reported months | +$167M thru Jun 2026 | $0 thru Jun 2026 |
| 30-day implied volatility | 20.6% | — |
| Holdings as of | as of Oct 8, 2026issuer data | as of Jun 30, 2026SEC filing |
Returns are price returns and exclude distributions. Flows are each fund's own latest reported months and may not cover the same period.
Largest shared holdings
70% of IWO · 61% of RESM| Holding | IWO | RESM |
|---|---|---|
| MXL | 0.55% | 0.56% |
| BTSG | 0.72% | 0.49% |
| FCFS | 0.58% | 0.43% |
| SNEX | 0.44% | 0.42% |
| PLXS | 0.47% | 0.42% |
| ESE | 0.45% | 0.41% |
| RHP | 0.55% | 0.39% |
| ENS | 0.41% | 0.38% |
| IDCC | 0.57% | 0.38% |
| SLAB | 0.49% | 0.37% |
| AGX | 0.37% | 0.48% |
| GKOS | 0.62% | 0.37% |
| NPO | 0.42% | 0.36% |
| FSS | 0.46% | 0.35% |
| HQY | 0.52% | 0.34% |
| OSCR | 0.54% | 0.34% |
| ZWS | 0.47% | 0.34% |
| MYRG | 0.33% | 0.34% |
| LNTH | 0.44% | 0.32% |
| KLIC | 0.32% | 0.35% |
| GVA | 0.30% | 0.31% |
| KRYS | 0.57% | 0.30% |
| CVLT | 0.43% | 0.30% |
| KGS | 0.37% | 0.30% |
| MRCY | 0.30% | 0.33% |
Sector mix of the stock holdings
| Sector | IWO | RESM | Gap |
|---|---|---|---|
| Health Care | 27.0% | 17.7% | +9.3% |
| Industrials | 17.3% | 17.1% | +0.2% |
| Technology | 19.5% | 12.9% | +6.6% |
| Financials | 9.1% | 14.9% | −5.9% |
| Consumer Discretionary | 10.0% | 9.2% | +0.8% |
| Materials | 6.6% | 5.2% | +1.4% |
| Real Estate | 2.2% | 5.9% | −3.7% |
| Energy | 2.9% | 2.8% | +0.1% |
| Utilities | 1.5% | 3.3% | −1.8% |
| Communication Services | 1.5% | 2.3% | −0.8% |
| Consumer Staples | 1.1% | 1.3% | −0.2% |
| Other | 0.1% | 0.1% | +0.0% |
More: full overlap table · IWO holdings · RESM holdings
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.