Returns or yields for the fund would have been lower if a portion of the management fee had not been waived. Review the annual or semiannual report for the most current information.

International investing involves special risks, such as political instability and currency fluctuations. Investing in emerging markets may accentuate these risks.

Please see the prospectus for details about sales charges.

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.

Investor Class Shares: 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. Non-Retirement Accounts: 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.

Only Investor Class shares are made available to investors directly. Advisor, A, C, I, and Y Classes of shares are only available for purchase by institutions or other financial intermediaries. R, R5, and R6 Classes of shares are only available for purchase by group employer-sponsored retirement plans. Review definitions and minimums for all share classes.

The portfolio managers use a variety of analytical research tools and techniques to help them make decisions about buying or holding issuers that meet their investment criteria and selling issuers that do not. In addition to fundamental financial metrics, the portfolio managers may also consider environmental, social, and/or governance (ESG) data to evaluate an issuer's sustainability characteristics. However, the portfolio managers may not consider ESG data with respect to every investment decision and, even when such data is considered, they may conclude that other attributes of an investment outweigh sustainability-related considerations when making decisions. Sustainability-related characteristics may or may not impact the performance of an issuer or the strategy, and the strategy may perform differently if it did not consider ESG data. Issuers with strong sustainability-related characteristics may or may not outperform issuers with weak sustainability-related characteristics. ESG data used by the portfolio managers often lacks standardization, consistency, and transparency, and may not be available, complete, or accurate. Not all American Century investment strategies incorporate ESG data into the process.

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Source: MSCI. Morgan Stanley Capital International (MSCI) makes no express or implied warranties or representations and shall have no liability whatsoever with respect to any MSCI data contained herein. The MSCI data may not be further redistributed or used to create indices or financial products. This report is not approved or produced by MSCI.