PortfoliosLab logo
PortfoliosLab logo
Tools
Performance Analysis
Portfolio Analysis
Factor Model
Portfolios
Lazy PortfoliosUser Portfolios
Discussions
American Century Government Bond Fund (CPTNX)
Performance
Risk-Adjusted Performance
Dividends
Drawdowns
Volatility

Fund Info

ISIN

US0250813088

CUSIP

025081308

Issuer

American Century Investments

Inception Date

May 15, 1980

Min. Investment

$2,500

Asset Class

Bond

Expense Ratio

CPTNX features an expense ratio of 0.47%, falling within the medium range.


Expense ratio chart for CPTNX: current value at 0.47% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.47%

Share Price Chart


Loading data...

Compare to other instruments

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


Popular comparisons:
CPTNX vs. KORP
Popular comparisons:
CPTNX vs. KORP

Performance

Performance Chart

The chart shows the growth of an initial investment of $10,000 in American Century Government Bond Fund, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.


-10.00%-5.00%0.00%5.00%AugustSeptemberOctoberNovemberDecember2025
-1.71%
3.10%
CPTNX (American Century Government Bond Fund)
Benchmark (^GSPC)

Returns By Period

American Century Government Bond Fund had a return of -1.30% year-to-date (YTD) and -1.05% in the last 12 months. Over the past 10 years, American Century Government Bond Fund had an annualized return of 0.21%, while the S&P 500 had an annualized return of 11.24%, indicating that American Century Government Bond Fund did not perform as well as the benchmark.


CPTNX

YTD

-1.30%

1M

-2.16%

6M

-1.71%

1Y

-1.05%

5Y*

-1.43%

10Y*

0.21%

^GSPC (Benchmark)

YTD

-0.66%

1M

-3.44%

6M

3.10%

1Y

22.14%

5Y*

12.04%

10Y*

11.24%

*Annualized

Monthly Returns

The table below presents the monthly returns of CPTNX, with color gradation from worst to best to easily spot seasonal factors. Returns are adjusted for dividends.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20240.01%-1.57%0.68%-2.65%1.69%1.10%2.41%1.52%1.16%-2.98%1.11%-2.02%0.27%
20232.98%-2.67%2.73%0.38%-1.03%-0.92%-0.44%-0.74%-3.21%-1.44%4.41%3.69%3.45%
2022-1.59%-0.61%-2.69%-2.94%0.09%-1.17%1.98%-2.78%-4.04%-1.63%3.26%-0.94%-12.54%
2021-0.34%-1.02%-0.79%0.69%-0.09%0.49%0.97%-0.09%-0.70%-0.18%0.36%-1.01%-1.71%
20201.91%1.95%1.82%0.58%-0.03%0.10%0.79%-0.55%0.05%-0.56%0.37%-0.30%6.26%
20190.59%-0.25%1.81%-0.24%1.89%0.84%0.12%2.38%-0.61%0.02%-0.07%-0.43%6.16%
2018-1.09%-0.64%0.57%-0.63%0.68%0.02%-0.17%0.52%-0.75%-0.54%0.81%1.83%0.57%
20170.17%0.45%-0.01%0.63%0.54%-0.28%0.37%0.82%-0.64%0.00%-0.18%0.28%2.15%
20161.68%0.67%0.24%-0.12%0.06%1.57%0.23%-0.29%0.06%-0.73%-2.33%-0.48%0.50%
20151.65%-0.92%0.49%-0.21%-0.29%-0.84%0.79%-0.13%0.67%-0.13%-0.31%-0.22%0.52%
20141.34%0.24%-0.31%0.60%0.78%0.14%-0.31%0.78%-0.31%0.77%0.67%0.13%4.60%

Risk-Adjusted Performance

Risk-Adjusted Performance Rank

The current rank of CPTNX is 8, meaning it’s performing worse than 92% of other mutual funds on our website when it comes to balancing risk and reward. Below is a breakdown of how it compares using common performance measures.


The Risk-Adjusted Performance Rank of CPTNX is 88
Overall Rank
The Sharpe Ratio Rank of CPTNX is 88
Sharpe Ratio Rank
The Sortino Ratio Rank of CPTNX is 77
Sortino Ratio Rank
The Omega Ratio Rank of CPTNX is 88
Omega Ratio Rank
The Calmar Ratio Rank of CPTNX is 1010
Calmar Ratio Rank
The Martin Ratio Rank of CPTNX is 99
Martin Ratio Rank
The risk-adjusted ranks indicate the investment's position relative to the market. A rank closer to 100 signifies top-performing investments, while a rank closer to 0 might suggest underperformance, based on the selected ratio. The values are calculated based on the past 12 months of returns.

Risk-Adjusted Performance Indicators

The charts below present risk-adjusted performance metrics for American Century Government Bond Fund (CPTNX) and compare them to a chosen benchmark (^GSPC). These indicators evaluate an investment's returns against its associated risks.


Sharpe ratio
The chart of Sharpe ratio for CPTNX, currently valued at -0.14, compared to the broader market-1.000.001.002.003.004.00-0.141.74
The chart of Sortino ratio for CPTNX, currently valued at -0.15, compared to the broader market0.002.004.006.008.0010.00-0.152.35
The chart of Omega ratio for CPTNX, currently valued at 0.98, compared to the broader market1.002.003.000.981.32
The chart of Calmar ratio for CPTNX, currently valued at -0.05, compared to the broader market0.005.0010.0015.00-0.052.62
The chart of Martin ratio for CPTNX, currently valued at -0.32, compared to the broader market0.0020.0040.0060.00-0.3210.82
CPTNX
^GSPC

The current American Century Government Bond Fund Sharpe ratio is -0.14. This value is calculated based on the past 1 year of trading data and takes into account price changes and dividends.

Use the chart below to compare the Sharpe ratio of American Century Government Bond Fund with the selected benchmark, providing insights into the investment's historical performance in terms of risk-adjusted returns. Go to the Sharpe ratio tool for more fine-grained control over the calculation options.


Rolling 12-month Sharpe Ratio0.001.002.003.00AugustSeptemberOctoberNovemberDecember2025
-0.14
1.74
CPTNX (American Century Government Bond Fund)
Benchmark (^GSPC)

Dividends

Dividend History

American Century Government Bond Fund provided a 3.90% dividend yield over the last twelve months, with an annual payout of $0.35 per share.


2.00%2.50%3.00%3.50%4.00%$0.00$0.10$0.20$0.30$0.4020142015201620172018201920202021202220232024
Dividends
Dividend Yield
PeriodTTM20242023202220212020201920182017201620152014
Dividend$0.35$0.35$0.38$0.24$0.18$0.19$0.28$0.27$0.23$0.20$0.19$0.19

Dividend yield

3.90%3.85%3.98%2.50%1.62%1.67%2.48%2.49%2.13%1.82%1.70%1.68%

Monthly Dividends

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


JanFebMarAprMayJunJulAugSepOctNovDecTotal
2025$0.00$0.00
2024$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.00$0.35
2023$0.03$0.03$0.03$0.06$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.38
2022$0.01$0.01$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.03$0.03$0.24
2021$0.02$0.01$0.02$0.02$0.02$0.02$0.02$0.01$0.01$0.01$0.01$0.02$0.18
2020$0.02$0.02$0.02$0.02$0.02$0.01$0.01$0.02$0.02$0.02$0.01$0.02$0.19
2019$0.02$0.02$0.02$0.02$0.03$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.28
2018$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.03$0.02$0.02$0.03$0.02$0.27
2017$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.23
2016$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.20
2015$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.19
2014$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.02$0.19

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.


-12.00%-10.00%-8.00%-6.00%-4.00%-2.00%0.00%AugustSeptemberOctoberNovemberDecember2025
-13.00%
-4.06%
CPTNX (American Century Government Bond Fund)
Benchmark (^GSPC)

Worst Drawdowns

The table below displays the maximum drawdowns of the American Century Government Bond 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 Government Bond Fund was 22.53%, occurring on Nov 11, 1994. Recovery took 274 trading sessions.

The current American Century Government Bond Fund drawdown is 13.00%.


Depth

Start

To Bottom

Bottom

To Recover

End

Total

-22.53%Oct 18, 1993280Nov 11, 1994274Nov 30, 1995554
-19.72%Aug 5, 2020815Oct 19, 2023
-13.32%Oct 6, 1998332Jan 12, 2000195Oct 20, 2000527
-10.72%Jan 2, 199689May 3, 1996150Nov 29, 1996239
-9.77%Nov 8, 200186Mar 14, 2002119Sep 4, 2002205

Volatility

Volatility Chart

The current American Century Government Bond Fund volatility is 1.31%, representing the average percentage change in the investments's value, either up or down over the past month. The chart below shows the rolling one-month volatility.


1.00%2.00%3.00%4.00%5.00%6.00%AugustSeptemberOctoberNovemberDecember2025
1.31%
4.57%
CPTNX (American Century Government Bond Fund)
Benchmark (^GSPC)
PortfoliosLab logo
Performance Analysis
Portfolio AnalysisPortfolio PerformanceStock ComparisonSharpe RatioMartin RatioTreynor RatioSortino RatioOmega RatioCalmar RatioSummers Ratio
Community
Discussions


Disclaimer

The information contained herein does not constitute investment advice and made available for educational purposes only. Prices and returns on equities are listed without consideration of fees, commissions, taxes, penalties, or interest payable due to purchasing, holding, or selling.

Copyright © 2025 PortfoliosLab