- ISIN
- US0249324361
- CUSIP
- 024932436
- Issuer
- American Century
- Inception Date
- Nov 30, 2006
- Category
- Short-Term Bond
- Min. Investment
- $2,500
- Distribution Policy
- Distributing
- Asset Class
- Bond
- Assets Under Management
- $996M
Share Price Chart
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Performance
ACSNX Performance Chart
American Century Short Duration Fund (ACSNX) is up 0.9% since the beginning of the year. ACSNX is currently trading at $10 per share. Investors who bought $1,000 worth of ACSNX shares 5 years ago would now be looking at an investment worth $1,113.
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Returns By Period
American Century Short Duration Fund (ACSNX) has returned 0.86% so far this year and 4.24% over the past 12 months.
American Century Short Duration Fund
- 1D
- 0.10%
- 1M
- 0.14%
- YTD
- 0.86%
- 6M
- 1.33%
- 1Y
- 4.24%
- 3Y*
- 4.85%
- 5Y*
- 2.17%
- 10Y*
- 2.32%
Benchmark (S&P 500 Index)
- 1D
- -2.64%
- 1M
- 0.25%
- YTD
- 7.86%
- 6M
- 7.47%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
ACSNX Monthly Returns History
Based on dividend-adjusted daily data since Dec 1, 2006, ACSNX's average daily return is +0.01%, while the average monthly return is +0.21%. At this rate, an investment would double in approximately 27.5 years.
Historically, 73% of months were positive and 27% were negative. The best month was Dec 2008 with a return of +1.6%, while the worst month was Mar 2020 at -2.2%. The longest winning streak lasted 19 consecutive months, and the longest losing streak was 4 months.
On a daily basis, ACSNX closed higher 25% of trading days. The best single day was Dec 30, 2011 with a return of +1.2%, while the worst single day was Dec 9, 2011 at -1.0%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.36% | 0.46% | -0.56% | 0.46% | 0.24% | -0.10% | 0.86% | ||||||
| 2025 | 0.50% | 0.70% | 0.19% | 0.61% | 0.20% | 0.89% | 0.07% | 0.80% | 0.37% | 0.36% | 0.46% | 0.37% | 5.65% |
| 2024 | 0.36% | -0.37% | 0.48% | -0.34% | 0.84% | 0.47% | 1.22% | 0.93% | 0.86% | -0.53% | 0.39% | 0.29% | 4.69% |
| 2023 | 0.87% | -0.45% | 1.15% | 0.39% | -0.40% | -0.56% | 0.43% | 0.35% | -0.15% | 0.27% | 1.31% | 1.43% | 4.72% |
| 2022 | -0.66% | -0.66% | -1.37% | -0.28% | 0.16% | -1.20% | 0.30% | -0.42% | -1.42% | -0.30% | 0.67% | 0.41% | -4.68% |
| 2021 | 0.19% | 0.10% | 0.12% | 0.33% | 0.24% | -0.04% | 0.21% | 0.02% | 0.11% | -0.19% | -0.18% | 0.05% | 0.97% |
Benchmark Metrics
American Century Short Duration Fund has an annualized alpha of 3.60%, beta of 0.03, and R2 of 0.04 versus S&P 500 Index. Calculated based on daily prices since December 04, 2006.
- This fund captured 11.52% of S&P 500 Index gains and tended to rise during its downturns (downside capture of -4.87%) - a profile typical of hedging or uncorrelated assets.
- Beta of 0.03 may look defensive, but with R2 of 0.04 this fund is largely uncorrelated with S&P 500 Index - low beta reflects independence, not downside protection. See the Volatility section for a true picture of this fund's risk.
- R2 of 0.04 means this fund moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.
- Alpha
- 3.60%
- Beta
- 0.03
- R²
- 0.04
- Upside Capture
- 11.52%
- Downside Capture
- -4.87%
Expense Ratio
ACSNX has an expense ratio of 0.57%, placing it in the medium range.
Return for Risk
Risk / Return Rank
ACSNX ranks 79 for risk / return — better than 79% of mutual funds on our site. You're getting solid returns for the risk taken. A good sign, especially for investors who want growth without excessive volatility.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for American Century Short Duration Fund (ACSNX) and compare them to S&P 500 Index.
| ACSNX | Benchmark | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | 1.62 | — | — |
| Calmar ratioReturn relative to maximum drawdown | 3.42 | — | — |
| Martin ratioReturn relative to average drawdown | 14.14 | — | — |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Dividends
Dividend History
American Century Short Duration Fund provided a 4.38% dividend yield over the last twelve months, with an annual payout of $0.43 per share. The fund has been increasing its distributions for 3 consecutive years.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend | $0.43 | $0.45 | $0.45 | $0.39 | $0.16 | $0.18 | $0.16 | $0.26 | $0.25 | $0.19 | $0.17 | $0.18 |
Dividend yield | 4.38% | 4.55% | 4.56% | 3.96% | 1.60% | 1.74% | 1.51% | 2.59% | 2.53% | 1.91% | 1.62% | 1.73% |
Monthly Dividends
The table displays the monthly dividend distributions for American Century Short Duration Fund. The dividends shown in the table have been adjusted to account for any splits that may have occurred.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | $0.04 | $0.04 | $0.03 | $0.04 | $0.03 | $0.00 | $0.17 | ||||||
| 2025 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.45 |
| 2024 | $0.04 | $0.03 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.04 | $0.03 | $0.04 | $0.04 | $0.04 | $0.45 |
| 2023 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.04 | $0.03 | $0.03 | $0.04 | $0.04 | $0.04 | $0.04 | $0.39 |
| 2022 | $0.01 | $0.01 | $0.01 | $0.01 | $0.02 | $0.00 | $0.00 | $0.02 | $0.00 | $0.02 | $0.03 | $0.03 | $0.16 |
| 2021 | $0.00 | $0.01 | $0.01 | $0.02 | $0.02 | $0.02 | $0.01 | $0.01 | $0.01 | $0.01 | $0.01 | $0.05 | $0.18 |
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 Short Duration Fund. 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 Short Duration Fund was 6.50%, occurring on Oct 20, 2022. Recovery took 393 trading sessions.
The current American Century Short Duration Fund drawdown is 0.10%.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
Bear market2022 | -6.50%Oct 2022 | 1y 16d | 1y 6mo | 2y 7moOct 2021 - May 2024 |
COVID crash2020 | -5.32%Mar 2020 | 15d | 2mo 17d | 3mo 2dMar 2020 - Jun 2020 |
Financial crisis2007–2009 | -1.27%Jun 2008 | 3mo 11d | 24d | 4mo 5dMar 2008 - Jul 2008 |
2026 pullback2026 | -1.21%Mar 2026 | 24d | 2mo 4d | 2mo 28dMar 2026 - May 2026 |
Financial crisis2007–2009 | -1.18%Nov 2008 | 7d | 22d | 29dNov 2008 - Dec 2008 |
Drawdown Indicators
| ACSNX | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -6.50% | -9.10% | +2.60% |
Max Drawdown (1Y)Largest decline over 1 year | -1.21% | — | — |
Max Drawdown (3Y)Largest decline over 3 years | -1.21% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -6.50% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -6.50% | — | — |
Current DrawdownCurrent decline from peak | -0.10% | -2.97% | +2.87% |
Average DrawdownAverage peak-to-trough decline | -0.59% | -1.13% | +0.54% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.29% | — | — |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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