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ACSGvsIWOETF Comparison
American Century Small Cap Growth Insights ETF
American Century Small Cap Growth Insights ETF (ACSG) and iShares Russell 2000 Growth ETF (IWO) belong to the same industry segment: US Small Cap Growth. ACSG's top 3 sector exposures are Information Technology, Industrials and Health Care. In contrast, IWO's top sector exposures are Health Care, Information Technology and Industrials. ACSG is more expensive with a Total Expense Ratio (TER) of 0.49%, versus 0.24% for IWO. ACSG is down -0.17% year-to-date (YTD) with +$3M in YTD flows. IWO performs worse with -2.1% YTD performance, and -$648M in YTD flows. Run a side-by-side ETF comparison of ACSG and IWO below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
ACSG vs IWO performance and flow charts
Performance
Cumulative Flows
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | ACSG IWO | -4.72%-4.45% | -3.76%-4.66% | -0.17%-2.10% | n/a+22.80% | n/a+48.61% | n/a+3.15% |
| Flows | ACSG IWO | +$2M-$134M | +$3M-$585M | +$3M-$648M | --$808M | --$696M | --$537M |
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | ACSG IWO | +19.54%+21.35% | n/a+25.14% | n/a+22.19% | n/a+24.58% |
| Max drawdown | ACSG IWO | -8.17%-10.53% | n/a-17.18% | n/a-28.47% | n/a-40.45% |
| Max drawdown duration | ACSG IWO | 48d49d | n/a46d | n/a280d | n/a1409d |
ACSG | IWO | |
Last sale 3/13/2026 at 7:48 PM | $314.55 | |
| Previous close 03/12/2026 | $316.45 | |
| Consolidated volume 03/12/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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ACSG | IWO | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
ACSG | IWO | |
|---|---|---|
| Last price | – | $314.55 |
| 1D performance | – | -0.60% |
| AuM | $9.68 M | $12.36 B |
| E/R | 0.49% | 0.24% |
ACSG | IWO | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | American Century Investments | iShares |
| Benchmark | - | Russell 2000 Growth Index |
| N° of holdings | 207 | 906 |
| Asset class | - | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | October 14, 2025 | July 24, 2000 |
| ESG | No | No |
Countries
Sectors
Diversification
Total weight of top 15 holdings out of 15
Total weight of top 15 holdings out of 15
Top 15 holdings
How have the ACSG and IWO ETFs performed in 2026?
As of March 11, 2026, ACSG is down -0.17% year-to-date (YTD), while IWO has lost -2.1%. That puts ACSG better performer ahead so far this year.
Which ETF is attracting more investor money: ACSG or IWO?
Year-to-date, the ACSG ETF saw +$3M in flows, compared to -$648M for IWO.
Which ETF is bigger: ACSG or IWO?
As of March 11, 2026, ACSG holds $9.68 M in assets under management (AUM), while IWO manages $12.36 B.
What sectors do the ACSG and IWO ETFs invest in?
ACSG leans toward sectors like Information Technology, Industrials and Health Care. Meanwhile, IWO focuses on Health Care, Information Technology and Industrials.
What are the top holdings of the ACSG ETF and IWO ETF?
ACSG top holdings include BLOOM ENERGY CORP, CREDO TECHNOLOGY GROUP HOLDING and FABRINET. IWO holds in its top three: BLOOM ENERGY CORP, CREDO TECHNOLOGY GROUP HOLDING and KRATOS DEFENSE AND SECURITY SOLS.
Which ETF is more diversified: ACSG or IWO?
ACSG holds 207 securities with 14.67% of its assets in the top 15. IWO has 1094 securities and a top 15 weight of 13.7%.
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