Summary Prospectus and Prospectus Supplement
Core Plus Fund Diversified Bond Fund Multisector Income Fund Short Duration Fund Short Duration Strategic Income Fund Summary Prospectuses and Prospectuses dated August 1, 2023 Multisector Floating Income ETF Summary Prospectus and Prospectus dated March 14, 2023 Multisector Income ETF Short Duration Strategic Income ETF Summary Prospectuses and Prospectuses dated January 1, 2023 Ginnie Mae Fund Government Bond Fund Short-Term Government Fund Summary Prospectuses and Prospectuses dated August 1, 2023
Supplement dated August 10, 2023

The change below will be effective as of August 31, 2023.

Peter Van Gelderen, Vice President and Senior Portfolio Manager, has announced his plans to leave American Century. As a result, he will no longer serve as a portfolio manager for the funds effective August 31, 2023.

©2023 American Century Proprietary Holdings, Inc. All rights reserved.

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