AGMNX — Ginnie Mae Fund, R5 Class
Data updated: 2026-08-28
AGMNX — Ginnie Mae Fund, R5 Class. 0.35% expense ratio · no sales load · since 2007. Holdings, fees, performance and SEC filings.
AGMNX Fund Overview
AGMNX — Ginnie Mae Fund, R5 Class is a US mutual fund managed by American Century Government Income Trust, categorised as Long Total / Aggregate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: American Century Government Income Trust
- Category: Long Total / Aggregate Bond
- Assets under management: $338.76M
- 1-year return: 4.9%
- Ticker: AGMNX
- SEC CIK: 0000773674
- SEC series ID: S000005966
- Share class ID: C000051002
AGMNX Investment Objective and Strategy
Ginnie Mae Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by American Century Government Income Trust.
Investment objective
Ginnie Mae seeks high current income while maintaining liquidity and safety of principal by investing primarily in GNMA certificates.
Principal investment strategy
Under normal market conditions, the fund invests at least 80% of its net assets in securities issued by the Government National Mortgage Association (GNMA). GNMA certificates represent interests in pools of mortgage loans and in the cash flows from these loans. Unlike many other mortgage-backed securities, the timely payment of principal and interest on these certificates is guaranteed by GNMA. GNMAs payment guarantee is stronger than most other government agencies because it is backed by the full faith and credit pledge of the U.S. government. In addition, the fund may buy other U.S. government debt securities, including U.S. Treasury securities and other securities issued or guaranteed by the U.S. government and its agencies and instrumentalities. Securities issued or guaranteed by other U.S.
government agencies or instrumentalities, such as the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), and the Federal Home Loan Bank are not guaranteed by the U.S. Treasury or supported by the full faith and credit of the U.S. government. However, these agencies or instrumentalities are authorized to borrow from the U.S. Treasury to meet their obligations. To generate additional income, the fund may purchase securities, including mortgage dollar rolls, in advance through when-issued and forward commitment transactions. The fund may commit up to 35% of its total assets to such transactions. The fund also may invest in derivative instruments such as options, futures contracts, options on futures contracts and swap agreements, or in mortgage- or asset-backed securities, provided that such investments are in keeping with the funds investment objective.
When determining whether to sell a security, the portfolio managers consider, among other things, current and anticipated changes in interest rates, current valuation relative to alternatives in the market, general market conditions and any other factors deemed relevant by the portfolio managers. The fund may engage in active and frequent trading of portfolio securities to achieve its principal investment strategies. This may cause higher transaction costs and may affect performance. It may also result in the realization and distribution of capital gains.
AGMNX Holdings
Top 10 holdings of Ginnie Mae Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| State Street Bank & Trust Co | 11.19% |
| Ginnie Mae | 10.14% |
| Government National Mortgage Association | 5.81% |
| Government National Mortgage Association | 4.19% |
| Government National Mortgage Association | 3.76% |
| Government National Mortgage Association | 3.71% |
| Ginnie Mae | 3.56% |
| Government National Mortgage Association | 3.39% |
| Ginnie Mae | 3.02% |
| Government National Mortgage Association | 2.83% |
AGMNX Portfolio Allocation
Asset-class allocation of Ginnie Mae Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Securitized | 104.1% |
| Cash & Equivalents | 11.2% |
AGMNX Performance
Total returns for AGMNX (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.28% |
| 1 year | 4.90% |
| 3 years (annualised) | 4.17% |
| 5 years (annualised) | 0.30% |
AGMNX Risk Information
Risk metrics for AGMNX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.91%
AGMNX Costs and Fees
AGMNX costs about $35 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.35%
- Gross expense ratio: 0.35%
- Portfolio turnover: 138%
- Brokerage commissions: 0.11 bps of average net assets (SEC N-CEN)
AGMNX Cashflows
Over the 12 months to 2026-06, Ginnie Mae Fund had net outflows of $29.21M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$1.62M |
| 2026-05 | −$2.18M |
| 2026-04 | −$6.39M |
| 2026-03 | −$3.22M |
| 2026-02 | −$2.60M |
| 2026-01 | −$1.49M |
AGMNX Debt Constituents
No individual debt constituents are reported in Ginnie Mae Fund's latest SEC N-PORT filing.
AGMNX Prospectus and SEC Filings
Official Ginnie Mae Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-07-29
- Prospectus (485BPOS) — filed 2025-07-29
- Prospectus (485BPOS) — filed 2024-07-29
- Portfolio holdings (N-PORT) — filed 2026-08-28
- Portfolio holdings (N-PORT) — filed 2026-05-29
- Portfolio holdings (N-PORT) — filed 2026-02-27
- Annual census (N-CEN) — filed 2026-06-11
- Annual census (N-CEN) — filed 2025-06-11
Related Funds
Other Long Total / Aggregate Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.