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 November 10, 2023

The following entry is added in the Portfolio Managers section in the summary prospectuses and the prospectuses:

Paul Norris, Vice President and Senior Portfolio Manager, has been a member of the team that manages the funds since 2023.

The following entry is added in The Fund Management Team section in the prospectus:

Paul Norris (Global Fixed Income Investment Committee Representative)

Paul Norris, Vice President and Senior Portfolio Manager, has been a member of the team that manages the fund since joining American Century Investments in 2023. Prior to joining American Century, Mr. Norris was the Managing Director and Head of Structured Products at Conning Asset Management. He has a bachelor’s of science in business administration from Towson University and an MBA in finance from The University of Maryland.

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