AMUSX — U.S. Government Securities Fund
Data updated: 2026-07-29
AMUSX — U.S. Government Securities Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Treasury / Sovereign Bond · $24.25B AUM · 0.65% expense ratio · 4.0% 1-yr return. From SEC regulatory filings.
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: $24.25B
- 1-year return: 4.0%
- 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 | 5.74% |
| United States Treasury | 2.51% |
| United States Treasury | 2.46% |
| United States Treasury | 2.07% |
| United States Treasury | 2.05% |
| United States Treasury | 2.00% |
| United States Treasury | 1.94% |
| United States Treasury | 1.85% |
| United States Treasury | 1.72% |
| United States Treasury | 1.43% |
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 | 61.5% |
| Securitized | 34.9% |
| Cash & Equivalents | 5.7% |
| Real Estate | 0.6% |
AMUSX Performance
Total returns for AMUSX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.3% |
| 1 year | 4.0% |
| 3 years (annualised) | 3.0% |
| 5 years (annualised) | -0.0% |
AMUSX Risk Information
Risk metrics for AMUSX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.3%
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 | 2.51% |
| United States Treasury | 2.46% |
| United States Treasury | 2.07% |
| United States Treasury | 2.05% |
| United States Treasury | 2.00% |
| United States Treasury | 1.94% |
| United States Treasury | 1.85% |
| United States Treasury | 1.72% |
| United States Treasury | 1.43% |
| United States Treasury | 1.37% |
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.