- ISIN
- US0250813088
- CUSIP
- 025081308
- Issuer
- American Century
- Inception Date
- May 15, 1980
- Category
- Government Bonds
- Min. Investment
- $2,500
- Distribution Policy
- Distributing
- Asset Class
- Bond
- Assets Under Management
- $460M
Share Price Chart
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Performance
CPTNX Performance Chart
American Century Government Bond Fund (CPTNX) is up 0.0% since the beginning of the year. CPTNX is currently trading at $9 per share. Investors who bought $1,000 worth of CPTNX shares 5 years ago would now be looking at an investment worth $968.
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Returns By Period
American Century Government Bond Fund (CPTNX) has returned -0.00% so far this year and 4.51% over the past 12 months. Over the last ten years, CPTNX has returned 0.83% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.
American Century Government Bond Fund
- 1D
- 0.22%
- 1M
- 0.88%
- YTD
- -0.00%
- 6M
- 0.33%
- 1Y
- 4.51%
- 3Y*
- 3.23%
- 5Y*
- -0.65%
- 10Y*
- 0.83%
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%
CPTNX Monthly Returns History
Based on dividend-adjusted daily data since May 16, 1980, CPTNX's average daily return is +0.02%, while the average monthly return is +0.43%. At this rate, an investment would double in approximately 13.5 years.
Historically, 64% of months were positive and 36% were negative. The best month was Nov 1981 with a return of +4.7%, while the worst month was Dec 1986 at -4.7%. The longest winning streak lasted 11 consecutive months, and the longest losing streak was 6 months.
On a daily basis, CPTNX closed higher 43% of trading days. The best single day was Oct 22, 1987 with a return of +5.7%, while the worst single day was Dec 31, 1986 at -4.5%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.22% | 1.68% | -1.78% | 0.00% | 0.01% | -0.11% | 0.00% | ||||||
| 2025 | 0.57% | 2.30% | -0.08% | 0.66% | -1.03% | 1.53% | -0.41% | 1.42% | 0.88% | 0.76% | 0.66% | -0.19% | 7.26% |
| 2024 | -0.31% | -1.57% | 0.67% | -2.65% | 1.71% | 1.09% | 2.41% | 1.52% | 1.16% | -2.98% | 1.11% | -1.68% | 0.32% |
| 2023 | 2.98% | -2.67% | 2.73% | 0.38% | -1.32% | -0.92% | -0.44% | -0.74% | -2.88% | -1.76% | 4.41% | 4.04% | 3.51% |
| 2022 | -1.59% | -0.62% | -2.69% | -2.94% | 0.09% | -1.36% | 1.77% | -2.78% | -4.28% | -1.63% | 3.26% | -0.94% | -13.10% |
| 2021 | -0.43% | -1.01% | -0.91% | 0.69% | 0.06% | 0.33% | 1.12% | -0.23% | -0.70% | -0.09% | 0.27% | -0.33% | -1.24% |
Benchmark Metrics
American Century Government Bond Fund has an annualized alpha of 5.43%, beta of -0.01, and R2 of 0.00 versus S&P 500 Index. Calculated based on daily prices since May 16, 1980.
- This fund captured 12.49% of S&P 500 Index gains and tended to rise during its downturns (downside capture of -10.26%) - a profile typical of hedging or uncorrelated assets.
- Beta of -0.01 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
- 5.43%
- Beta
- -0.01
- R²
- 0.00
- Upside Capture
- 12.49%
- Downside Capture
- -10.26%
Expense Ratio
CPTNX has an expense ratio of 0.47%, placing it in the medium range.
Return for Risk
Risk / Return Rank
CPTNX ranks 17 for risk / return — in the bottom 17% of mutual funds on our site. This means you're taking on significantly more risk than the returns justify. Consider whether the potential upside is worth the volatility, or explore alternatives with better risk / return profiles.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for American Century Government Bond Fund (CPTNX) 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.
| CPTNX | Benchmark | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.90 | ||
| Sortino ratioReturn per unit of downside risk | -1.06 | ||
| Omega ratioGain probability vs. loss probability | 1.20 | 1.37 | -0.17 |
| Calmar ratioReturn relative to maximum drawdown | 1.35 | 2.78 | -1.44 |
| Martin ratioReturn relative to average drawdown | 3.96 | 12.44 | -8.48 |
Dividends
Dividend History
American Century Government Bond Fund provided a 4.02% dividend yield over the last twelve months, with an annual payout of $0.37 per share.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend | $0.37 | $0.39 | $0.39 | $0.36 | $0.18 | $0.24 | $0.24 | $0.28 | $0.27 | $0.23 | $0.25 | $0.19 |
Dividend yield | 4.02% | 4.07% | 4.22% | 3.72% | 1.84% | 2.10% | 2.09% | 2.48% | 2.49% | 2.14% | 2.28% | 1.69% |
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.00 | $0.15 | ||||||
| 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 | $0.39 |
| 2024 | $0.03 | $0.03 | $0.03 | $0.03 | $0.04 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.39 |
| 2023 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.36 |
| 2022 | $0.01 | $0.01 | $0.02 | $0.02 | $0.02 | $0.00 | $0.00 | $0.02 | $0.00 | $0.02 | $0.03 | $0.03 | $0.18 |
| 2021 | $0.00 | $0.01 | $0.02 | $0.02 | $0.02 | $0.02 | $0.02 | $0.01 | $0.01 | $0.01 | $0.01 | $0.09 | $0.24 |
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 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 19.73%, occurring on Oct 19, 2023. The portfolio has not yet recovered.
The current American Century Government Bond Fund drawdown is 5.10%.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
2023 correction2023 | -19.73%Oct 2023 | 3y 2mo | — | 5y 10moAug 2020 - now |
Black Monday1987 | -14.00%Oct 1987 | 10mo 11d | 1y 7mo | 2y 5moDec 1986 - May 1989 |
1980 pullback1980 | -6.63%Dec 1980 | 6mo 1d | 3mo 3d | 9mo 4dJun 1980 - Mar 1981 |
1986 pullback1986 | -6.42%Jun 1986 | 1mo 18d | 2mo 9d | 3mo 27dApr 1986 - Aug 1986 |
1999 pullback1999 | -5.98%Jun 1999 | 6mo 12d | 1y 10d | 1y 6moDec 1998 - Jul 2000 |
Drawdown Indicators
| CPTNX | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.73% | -56.78% | +37.05% |
Max Drawdown (1Y)Largest decline over 1 year | -3.36% | -9.10% | +5.74% |
Max Drawdown (3Y)Largest decline over 3 years | -7.26% | -18.90% | +11.64% |
Max Drawdown (5Y)Largest decline over 5 years | -19.15% | -25.43% | +6.28% |
Max Drawdown (10Y)Largest decline over 10 years | -19.73% | -33.92% | +14.19% |
Current DrawdownCurrent decline from peak | -5.10% | -1.80% | -3.30% |
Average DrawdownAverage peak-to-trough decline | -2.29% | -10.71% | +8.42% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.14% | 2.03% | -0.89% |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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