Global Bond Fund

Returns or yields for the fund would have been lower if .04% of the management fee had not been waived. The advisor expects this waiver to continue until July 31, 2021, and cannot terminate it prior to such date without the approval of the Board of Directors. Review the annual or semiannual report for the most current information.

The value and/or returns of a portfolio will fluctuate with market and economic conditions.

Investments in fixed income securities are subject to the risks associated with debt securities including credit, price and interest rate risk.

Generally, as interest rates rise, the value of the securities held in the fund will decline. The opposite is true when interest rates decline.

International investing involves special risks, such as political instability and currency fluctuations.

Diversification does not assure a profit nor does it protect against loss of principal.

The gross expense ratio is the fund's total annual operating costs, expressed as a percentage of the fund's average net assets for a given time period. It is gross of any fee waivers or expense reimbursement. The net expense ratio is the expense ratio after the application of any waivers or reimbursement. This is the actual ratio that investors paid during the fund's most recent fiscal year. Please see the prospectus for more information.

^W2 Minimum initial investment is $1,000 for IRA and CESA accounts, and $2,500 for non-retirement accounts, but these minimums are waived with an initial investment of at least $500 per account and automatic investments of at least $100 per month. If your account balance falls below the minimum, or if you cancel your automatic monthly investment plan prior to reaching the minimum, American Century Investments may redeem the account and send the proceeds to you. Prior to doing so, we will notify you and give you 90 days to meet the minimum or reinstate your automatic monthly investment plan.