- Issuer
- American Century
- Inception Date
- Oct 14, 2025
- Region
- North America (U.S.)
- Category
- Small Cap Growth Equities
- Leveraged
- 1x (No leverage)
- Index Tracked
- No Index (Active)
- Domicile
- US
- Distribution Policy
- Distributing
- Asset Class
- Equity
- Asset Class Size
- Small-Cap
- Asset Class Style
- Growth
- Assets Under Management
- $17M
Share Price Chart
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Performance
ACSG Performance Chart
American Century Small Cap Growth Insights ETF (ACSG) is up 19.8% since the beginning of the year. ACSG is currently trading at $49 per share.
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Returns By Period
American Century Small Cap Growth Insights ETF
- 1D
- 2.70%
- 1M
- 5.63%
- YTD
- 19.84%
- 6M
- 17.82%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
Benchmark (S&P 500 Index)
- 1D
- 0.00%
- 1M
- -0.71%
- YTD
- 8.39%
- 6M
- 8.57%
- 1Y
- 24.33%
- 3Y*
- 18.94%
- 5Y*
- 12.24%
- 10Y*
- 13.54%
ACSG Monthly Returns History
Based on dividend-adjusted daily data since Oct 16, 2025, ACSG's average daily return is +0.11%, while the average monthly return is +2.05%. At this rate, an investment would double in approximately 2.8 years.
Historically, 67% of months were positive and 33% were negative. The best month was Apr 2026 with a return of +12.8%, while the worst month was Mar 2026 at -5.9%. The longest winning streak lasted 3 consecutive months, and the longest losing streak was 1 months.
On a daily basis, ACSG closed higher 51% of trading days. The best single day was Mar 31, 2026 with a return of +4.5%, while the worst single day was Jun 5, 2026 at -3.9%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2.36% | 0.73% | -5.89% | 12.82% | 5.60% | 3.66% | 19.84% | ||||||
| 2025 | -0.69% | 1.29% | -1.44% | -0.86% |
Benchmark Metrics
American Century Small Cap Growth Insights ETF has an annualized alpha of 3.55%, beta of 1.48, and R2 of 0.76 versus S&P 500 Index. Calculated based on daily prices since October 16, 2025.
- This ETF captured 110.18% of S&P 500 Index gains but only 41.67% of its losses - a favorable profile for investors.
- This ETF generated an annualized alpha of 3.55% versus S&P 500 Index - delivering returns beyond what market exposure alone would predict.
- Alpha
- 3.55%
- Beta
- 1.48
- R²
- 0.76
- Upside Capture
- 110.18%
- Downside Capture
- 41.67%
Expense Ratio
ACSG has an expense ratio of 0.49%, placing it in the medium range.
Return for Risk
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for American Century Small Cap Growth Insights ETF (ACSG) and compare them to S&P 500 Index.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| ACSG | Benchmark | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.35 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 2.66 | — |
| Martin ratioReturn relative to average drawdown | — | 11.86 | — |
Dividends
Dividend History
Drawdowns
Drawdowns Chart
The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.
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Worst Drawdowns
The table below displays the maximum drawdowns of the American Century Small Cap Growth Insights ETF. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.
The maximum drawdown for the American Century Small Cap Growth Insights ETF was 13.28%, occurring on Mar 30, 2026. Recovery took 13 trading sessions.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
2026 correction2026 | -13.28%Mar 2026 | 2mo 6d | 18d | 2mo 24dJan 2026 - Apr 2026 |
2025 pullback2025 | -9.23%Nov 2025 | 23d | 21d | 1mo 14dOct 2025 - Dec 2025 |
2026 pullback2026 | -5.17%May 2026 | 12d | 7d | 19dMay 2026 - May 2026 |
2025 pullback2025 | -4.36%Dec 2025 | 5d | 20d | 25dDec 2025 - Jan 2026 |
2026 pullback2026 | -4.24%Jun 2026 | 12d | 2d | 14dMay 2026 - Jun 2026 |
Drawdown Indicators
| ACSG | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -13.28% | -56.78% | +43.50% |
Max Drawdown (1Y)Largest decline over 1 year | — | -9.10% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -18.90% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -25.43% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.92% | — |
Current DrawdownCurrent decline from peak | 0.00% | -2.49% | +2.49% |
Average DrawdownAverage peak-to-trough decline | -2.95% | -10.72% | +7.77% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 2.03% | — |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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