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ISIN
US0250815067
CUSIP
025081506
Inception Date
Dec 14, 1982
Min. Investment
$2,500
Distribution Policy
Distributing
Asset Class
Bond
Assets Under Management
$185M

Share Price Chart


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Performance

TWUSX Performance Chart

American Century Short-Term Government Fund (TWUSX) is up 0.3% since the beginning of the year. TWUSX is currently trading at $9 per share. Investors who bought $1,000 worth of TWUSX shares 5 years ago would now be looking at an investment worth $1,078.


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S&P 500 Index

Returns By Period

American Century Short-Term Government Fund (TWUSX) has returned 0.25% so far this year and 3.07% over the past 12 months. Over the last ten years, TWUSX has returned 1.48% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.


American Century Short-Term Government Fund

1D
0.11%
1M
0.32%
YTD
0.25%
6M
0.55%
1Y
3.07%
3Y*
3.95%
5Y*
1.52%
10Y*
1.48%

Benchmark (S&P 500 Index)

1D
-0.37%
1M
-0.01%
YTD
9.16%
6M
8.64%
1Y
25.22%
3Y*
19.78%
5Y*
11.99%
10Y*
13.88%
*Multi-year figures are annualized to reflect compound growth (CAGR)

TWUSX Monthly Returns History

Based on dividend-adjusted daily data since Dec 15, 1982, TWUSX's average daily return is +2.02%, while the average monthly return is +4.80%. At this rate, an investment would double in approximately 1.2 years.

Historically, 65% of months were positive and 35% were negative. The best month was Jul 1992 with a return of +921.0%, while the worst month was Jun 1985 at -90.0%. The longest winning streak lasted 21 consecutive months, and the longest losing streak was 9 months.

On a daily basis, TWUSX closed higher 27% of trading days. The best single day was Jul 31, 1992 with a return of +904.8%, while the worst single day was Feb 28, 1985 at -90.1%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20260.18%0.50%-0.37%0.18%-0.01%-0.22%0.25%
20250.33%0.75%0.33%0.86%-0.21%0.64%-0.02%0.86%0.30%0.30%0.40%0.30%4.94%
20240.23%-0.45%0.24%-0.43%0.72%0.55%1.24%0.91%0.75%-0.76%0.33%0.21%3.59%
20230.68%-0.74%1.64%0.16%-0.44%-0.74%0.20%0.35%-0.19%0.27%1.25%1.25%3.70%
2022-0.60%-0.39%-1.30%-0.44%0.34%-0.74%0.21%-0.73%-1.18%-0.15%0.56%0.05%-4.31%
20210.10%0.10%0.05%0.17%0.06%-0.23%0.23%-0.07%-0.09%-0.10%-0.20%-0.11%-0.09%

Benchmark Metrics

American Century Short-Term Government Fund has an annualized alpha of 14728.78%, beta of 0.39, and R2 of 0.00 versus S&P 500 Index. Calculated based on daily prices since December 15, 1982.

  • This fund participated in 66.87% of S&P 500 Index downside but only 25.78% of its upside - more exposed to losses than it benefited from rallies.
  • Beta of 0.39 may look defensive, but with R2 of 0.00 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 0.00 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
14,728.78%
Beta
0.39
0.00
Upside Capture
25.78%
Downside Capture
66.87%

Expense Ratio

TWUSX has an expense ratio of 0.55%, placing it in the medium range.


Return for Risk

Risk / Return Rank

TWUSX ranks 58 for risk / return — on par with similar mutual funds. You're getting a typical balance of risk and reward. Not a standout, but not a red flag either — a reasonable choice if other factors align with your goals.


TWUSX Risk / Return Rank: 5858
Overall Rank
TWUSX Sharpe Ratio Rank: 4040
Sharpe Ratio Rank
TWUSX Sortino Ratio Rank: 6363
Sortino Ratio Rank
TWUSX Omega Ratio Rank: 5757
Omega Ratio Rank
TWUSX Calmar Ratio Rank: 7373
Calmar Ratio Rank
TWUSX Martin Ratio Rank: 5656
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-Term Government Fund (TWUSX) 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.


TWUSXBenchmarkDifference
Sharpe ratioReturn per unit of total volatility

-0.32

Sortino ratioReturn per unit of downside risk

+0.27

Omega ratioGain probability vs. loss probability

1.38

1.37

+0.01

Calmar ratioReturn relative to maximum drawdown

3.16

2.78

+0.37

Martin ratioReturn relative to average drawdown

10.64

12.44

-1.80

Dividends

Dividend History

American Century Short-Term Government Fund provided a 3.60% dividend yield over the last twelve months, with an annual payout of $0.33 per share.


1.00%2.00%3.00%4.00%$0.00$0.10$0.20$0.30$0.4020152016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM20252024202320222021202020192018201720162015
Dividend$0.33$0.34$0.37$0.35$0.10$0.10$0.07$0.17$0.16$0.10$0.06$0.05

Dividend yield

3.60%3.70%4.06%3.83%1.12%1.05%0.72%1.81%1.74%1.06%0.57%0.53%

Monthly Dividends

The table displays the monthly dividend distributions for American Century Short-Term Government Fund. The dividends shown in the table have been adjusted to account for any splits that may have occurred.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
2026$0.03$0.03$0.03$0.03$0.03$0.00$0.13
2025$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.34
2024$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.37
2023$0.02$0.02$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.35
2022$0.00$0.00$0.01$0.01$0.01$0.00$0.00$0.01$0.00$0.02$0.02$0.03$0.10
2021$0.00$0.00$0.01$0.01$0.01$0.01$0.00$0.00$0.00$0.00$0.00$0.07$0.10

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-Term Government 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-Term Government Fund was 91.06%, occurring on Apr 26, 1990. Recovery took 568 trading sessions.

The current American Century Short-Term Government Fund drawdown is 64.66%.


Related event

Drawdown

Fall

Recovery

Underwater

1990 bear market1990
-91.06%Apr 1990
4y 4mo2y 3mo
6y 7moDec 1985 - Jul 1992
1984 bear market1984
-90.75%Jun 1984
1y 5mo1y 5mo
2y 11moJan 1983 - Dec 1985
1985 bear market1985
-90.02%Dec 1985
0s4d
4dDec 1985 - Dec 1985
1992 bear market1992
-90.00%Aug 1992
0s
33y 11moAug 1992 - now
1992 pullback1992
-2.06%Aug 1992
0s1d
1dAug 1992 - Aug 1992

Drawdown Indicators


TWUSXBenchmarkDifference

Max Drawdown

Largest peak-to-trough decline

-91.06%

-56.78%

-34.28%

Max Drawdown (1Y)

Largest decline over 1 year

-0.98%

-9.10%

+8.12%

Max Drawdown (3Y)

Largest decline over 3 years

-1.09%

-18.90%

+17.81%

Max Drawdown (5Y)

Largest decline over 5 years

-5.81%

-25.43%

+19.62%

Max Drawdown (10Y)

Largest decline over 10 years

-5.85%

-33.92%

+28.07%

Current Drawdown

Current decline from peak

-64.66%

-1.80%

-62.86%

Average Drawdown

Average peak-to-trough decline

-76.91%

-10.71%

-66.20%

Ulcer Index

Depth and duration of drawdowns from previous peaks

0.29%

2.03%

-1.74%

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.


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Portfolio Analyzer

Build a portfolio with TWUSX

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