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ISIN
US0249324361
CUSIP
024932436
Inception Date
Nov 30, 2006
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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S&P 500 Index

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*
*Multi-year figures are annualized to reflect compound growth (CAGR)

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%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20260.36%0.46%-0.56%0.46%0.24%-0.10%0.86%
20250.50%0.70%0.19%0.61%0.20%0.89%0.07%0.80%0.37%0.36%0.46%0.37%5.65%
20240.36%-0.37%0.48%-0.34%0.84%0.47%1.22%0.93%0.86%-0.53%0.39%0.29%4.69%
20230.87%-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%
20210.19%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
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.


ACSNX Risk / Return Rank: 7979
Overall Rank
ACSNX Sharpe Ratio Rank: 6161
Sharpe Ratio Rank
ACSNX Sortino Ratio Rank: 9191
Sortino Ratio Rank
ACSNX Omega Ratio Rank: 8888
Omega Ratio Rank
ACSNX Calmar Ratio Rank: 7878
Calmar Ratio Rank
ACSNX Martin Ratio Rank: 7878
Martin Ratio Rank
The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

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.


ACSNXBenchmarkDifference
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

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.


1.00%2.00%3.00%4.00%5.00%$0.00$0.10$0.20$0.30$0.4020152016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM20252024202320222021202020192018201720162015
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.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
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 16d1y 6mo
2y 7moOct 2021 - May 2024
COVID crash2020
-5.32%Mar 2020
15d2mo 17d
3mo 2dMar 2020 - Jun 2020
Financial crisis2007–2009
-1.27%Jun 2008
3mo 11d24d
4mo 5dMar 2008 - Jul 2008
2026 pullback2026
-1.21%Mar 2026
24d2mo 4d
2mo 28dMar 2026 - May 2026
Financial crisis2007–2009
-1.18%Nov 2008
7d22d
29dNov 2008 - Dec 2008

Drawdown Indicators


ACSNXBenchmarkDifference

Max Drawdown

Largest 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 Drawdown

Current decline from peak

-0.10%

-2.97%

+2.87%

Average Drawdown

Average peak-to-trough decline

-0.59%

-1.13%

+0.54%

Ulcer Index

Depth 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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Portfolio Analyzer

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