- Sector
- Financial Services
- Industry
- Asset Management
- Address
- 4500 Main Street Kansas City MO United States of America 64111
- IPO Date
- Dec 1, 2006
- Business
- American Century Short Duration Fund Investor Class (ACSNX) is an open-end mutual fund managed by American Century Investments that seeks total return, with a secondary objective of providing a high level of current income. The fund invests primarily in investment-grade, non-money market debt securities, including U.S. Treasury notes and bonds, agency mortgage-backed securities, corporate bonds, non-agency residential mortgage-backed securities, and asset-backed securities; its portfolio typically features limited interest-rate sensitivity with an effective duration of around 1.90 years and medium credit quality, benchmarked against the Bloomberg U.S. 1-3 Year Government/Credit Bond Index. Launched on November 30, 2006, and domiciled in the United States, the Investor Class shares carry a net expense ratio of 0.56%, minimum initial investment of $2,500 for non-retirement accounts ($1,000 for IRAs), and are available primarily to U.S. investors through brokerage platforms.
The fund's asset allocation emphasizes U.S. bonds (approximately 80%), supplemented by non-U.S. bonds (14%), cash equivalents, and other fixed-income instruments; top sectors include corporate bonds (45%), government securities (18%), and securitized products, with key holdings such as United States Treasury Notes (4.125%, 3.75%, 3.875%) and FREMF Mortgage Trust securities. Total net assets stand at approximately $1.10-$1.30 billion, with the Investor Class representing about $293 million. The fund is managed by a team led by Robert Gahagan (since inception), alongside James Platz (since 2007), Charles Tan (since 2018), Paul Norris (since November 2023), and Barbara Bartolini (since September 2024).
Recent changes include a reduction in the management fee effective August 1, 2023, which lowered reported expenses and improved net returns for investors; additionally, the retirement of longtime co-manager Jeff Houston in August 2024 prompted a redistribution of duties among the remaining experienced team, maintaining the fund's Average People rating per Morningstar analysis without altering overall strategy. Paul Norris joined as a senior portfolio manager in November 2023, and Barbara Bartolini was added to the management team in September 2024, enhancing fixed-income expertise amid ongoing portfolio adjustments to navigate interest rate environments and credit opportunities. As of late 2025, the fund reports a YTD total return of 5.18% and NAV of $9.88, reflecting steady performance in the short-term bond category.