AMUSX — U.S. Government Securities Fund
Data updated: 2026-04-27
AMUSX — U.S. Government Securities Fund: Long Treasury / Sovereign Bond · $24.65B AUM · 0.65% expense ratio · 6.1% 1-yr return. Holdings, expenses…
AMUSX Fund Overview
AMUSX — U.S. Government Securities Fund is a US mutual fund managed by American Funds Income Series, categorised as Long Treasury / Sovereign 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 Funds Income Series
- Category: Long Treasury / Sovereign Bond
- Assets under management: $24.65B
- 1-year return: 6.1%
- Ticker: AMUSX
- SEC CIK: 0000770161
- SEC series ID: S000009235
- Share class ID: C000025132
AMUSX Holdings
Top 10 holdings of U.S. Government Securities Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Capital Group Central Cash Fund | 4.48% |
| United States Treasury | 2.49% |
| United States Treasury | 2.42% |
| United States Treasury | 2.33% |
| United States Treasury | 1.99% |
| United States Treasury | 1.90% |
| United States Treasury | 1.75% |
| United States Treasury | 1.70% |
| United States Treasury | 1.62% |
| United States Treasury | 1.42% |
AMUSX Portfolio Allocation
Asset-class allocation of U.S. Government Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 57.6% |
| Securitized | 40.2% |
| Cash & Equivalents | 4.5% |
| Real Estate | 0.4% |
AMUSX Performance
Total returns for AMUSX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.5% |
| 1 year | 6.1% |
| 3 years (annualised) | 4.2% |
| 5 years (annualised) | 0.3% |
AMUSX Risk Information
Risk metrics for AMUSX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.0%
AMUSX Costs and Fees
AMUSX costs about $65 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.65%
- Gross expense ratio: 0.65%
- Portfolio turnover: 309%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
AMUSX Cashflows
Over the 12 months to 2026-02, U.S. Government Securities Fund had net inflows of $1.06B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | −$11.48M |
| 2026-01 | $428.75M |
| 2025-12 | $247.71M |
| 2025-11 | −$13.69M |
| 2025-10 | $86.82M |
| 2025-09 | $233.77M |
AMUSX Debt Constituents
Largest debt holdings of U.S. Government Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 2.49% |
| United States Treasury | 2.42% |
| United States Treasury | 2.33% |
| United States Treasury | 1.99% |
| United States Treasury | 1.90% |
| United States Treasury | 1.75% |
| United States Treasury | 1.70% |
| United States Treasury | 1.62% |
| United States Treasury | 1.42% |
| United States Treasury | 1.24% |
AMUSX Prospectus and SEC Filings
Official U.S. Government Securities Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Treasury / Sovereign 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.