PortfoliosLab logoPortfoliosLab logo
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


Loading charts...

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.


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 $1,076.


Loading charts...

Benchmark

Compare this symbol against anything

Returns By Period

American Century Short-Term Government Fund (TWUSX) has returned 0.33% so far this year and 2.07% over the past 12 months. Over the last ten years, TWUSX has returned 1.49% per year, falling short of the S&P 500 Index benchmark, which averaged 13.26% annually.


American Century Short-Term Government Fund

1D
0.00%
1M
-0.22%
6M
0.15%
YTD
0.33%
1Y
2.07%
3Y*
3.94%
5Y*
1.48%
10Y*
1.49%
ALL TIME*
-2.30%

Benchmark (S&P 500 Index)

1D
0.70%
1M
0.09%
6M
7.94%
YTD
9.41%
1Y
20.07%
3Y*
17.84%
5Y*
11.25%
10Y*
13.26%
ALL TIME*
8.09%
*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 +4.79%. 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%0.08%-0.22%0.33%
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 14542.37%, 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 66.77% 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
14,542.37%
Beta
0.39
0.00
Upside Capture
25.78%
Downside Capture
66.77%

Expense Ratio

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


Return for Risk

Risk / Return Rank

TWUSX ranks 76 for risk / return — above 76% of mutual funds peers on PortfoliosLab. Its historical combined result is above most peers.


TWUSX Risk / Return Rank: 7676
Overall Rank
TWUSX Sharpe Ratio Rank: 6565
Sharpe Ratio Rank
TWUSX Sortino Ratio Rank: 8080
Sortino Ratio Rank
TWUSX Omega Ratio Rank: 7878
Omega Ratio Rank
TWUSX Calmar Ratio Rank: 8383
Calmar Ratio Rank
TWUSX Martin Ratio Rank: 7474
Martin Ratio Rank
The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

Risk / Return 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

+0.21

Sortino ratioReturn per unit of downside risk

+0.84

Omega ratioGain probability vs. loss probability

1.36

1.25

+0.10

Calmar ratioReturn relative to maximum drawdown

2.91

2.00

+0.91

Martin ratioReturn relative to average drawdown

9.47

8.49

+0.98

Dividends

Dividend History

American Century Short-Term Government Fund provided a 3.29% dividend yield over the last twelve months, with an annual payout of $0.30 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$0.30$0.34$0.37$0.35$0.10$0.10$0.07$0.17$0.16$0.10$0.06$0.05

Dividend yield

3.29%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$0.03$0.00$0.16
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.


Loading charts...

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 64.63%.


Drawdown

Fall

Recovery

Underwater

Related event

-91.06%Apr 1990
4y 4mo2y 3mo
6y 7moDec 1985 - Jul 1992
-90.75%Jun 1984
1y 5mo1y 5mo
2y 11moJan 1983 - Dec 1985
-90.02%Dec 1985
1d4d
4dDec 1985 - Dec 1985
-90.00%Aug 1992
1d
34y 5dAug 1992 - now
-2.06%Aug 1992
1d1d
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

-64.63%

-1.58%

-63.05%

Average Drawdown

Average peak-to-trough decline

-76.88%

-10.70%

-66.18%

Ulcer Index

Depth and duration of drawdowns from previous peaks

0.30%

2.14%

-1.84%

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.


Loading charts...

Portfolio Analyzer

Build a portfolio with TWUSX

Add American Century Short-Term Government Fund to a portfolio and analyze allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.

Open Portfolio Analyzer with TWUSX