American Century Government Bond Fund (CPTNX)

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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.

American Century Government Bond Fund (CPTNX) has returned -0.43% so far this year and 3.89% over the past 12 months. Over the last ten years, CPTNX has returned 0.87% per year, falling short of the S&P 500 Index benchmark, which averaged 12.16% annually.

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, your investment would double in approximately 13.5 years.

Historically, 65% of months were positive and 35% 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%.

American Century Government Bond Fund has an annualized alpha of 5.45%, beta of -0.02, and R² of 0.00 versus S&P 500 Index. Calculated based on daily prices since May 19, 1980.

• This fund captured 12.68% of S&P 500 Index gains and tended to rise during its downturns (downside capture of -10.18%) — a profile typical of hedging or uncorrelated assets.
• Beta of -0.02 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.

CPTNX has an expense ratio of 0.47%, placing it in the medium range.

CPTNX ranks 47 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.

The table below present risk-adjusted performance metrics for American Century Government Bond Fund (CPTNX) and compare them to a chosen benchmark (S&P 500 Index).

American Century Government Bond Fund provided a 3.73% dividend yield over the last twelve months, with an annual payout of $0.35 per share.

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.

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.

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 5.51%.

The chart below shows the rolling one-month volatility.