AIAYX — Inflation-Adjusted Bond Fund
Data updated: 2026-06-11
AIAYX — Inflation-Adjusted Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Intermediate Treasury / Sovereign Bond · $2.01B AUM · 0.34% expense ratio · 2.9% 1-yr return. From SEC regulatory filings.
AIAYX Fund Overview
AIAYX — Inflation-Adjusted Bond Fund is a US mutual fund managed by American Century Government Income Trust, categorised as Intermediate 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 Century Government Income Trust
- Category: Intermediate Treasury / Sovereign Bond
- Assets under management: $2.01B
- 1-year return: 2.9%
- Ticker: AIAYX
- SEC CIK: 0000773674
- SEC series ID: S000005969
- Share class ID: C000181797
AIAYX Holdings
Top 10 holdings of Inflation-Adjusted Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury Inflation Indexed Bonds | 5.66% |
| United States Treasury Inflation Indexed Bonds | 4.81% |
| United States Treasury Inflation Indexed Bonds | 4.79% |
| United States Treasury Inflation Indexed Bonds | 4.54% |
| United States Treasury Inflation Indexed Bonds | 4.04% |
| United States Treasury Inflation Indexed Bonds | 3.84% |
| United States Treasury Inflation Indexed Bonds | 3.49% |
| United States Treasury Inflation Indexed Bonds | 3.47% |
| United States Treasury Inflation Indexed Bonds | 3.33% |
| Regatta Funding Co LLC | 2.98% |
AIAYX Portfolio Allocation
Asset-class allocation of Inflation-Adjusted Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 85.2% |
| Securitized | 7.2% |
| Cash & Equivalents | 4.2% |
| Equity | 3.2% |
| Derivatives | 0.5% |
AIAYX Performance
Total returns for AIAYX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.4% |
| 1 year | 2.9% |
| 3 years (annualised) | 2.9% |
| 5 years (annualised) | 1.4% |
AIAYX Risk Information
Risk metrics for AIAYX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.9%
AIAYX Costs and Fees
AIAYX costs about $34 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.34%
- Gross expense ratio: 0.34%
- Portfolio turnover: 49%
- Brokerage commissions: 0.28 bps of average net assets (SEC N-CEN)
AIAYX Cashflows
Over the 12 months to 2026-03, Inflation-Adjusted Bond Fund had net outflows of $321.62M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$29.11M |
| 2026-02 | −$44.01M |
| 2026-01 | −$6.86M |
| 2025-12 | −$20.16M |
| 2025-11 | $5.43M |
| 2025-10 | −$37.53M |
AIAYX Debt Constituents
Largest debt holdings of Inflation-Adjusted Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury Inflation Indexed Bonds | 5.66% |
| United States Treasury Inflation Indexed Bonds | 4.81% |
| United States Treasury Inflation Indexed Bonds | 4.79% |
| United States Treasury Inflation Indexed Bonds | 4.54% |
| United States Treasury Inflation Indexed Bonds | 4.04% |
| United States Treasury Inflation Indexed Bonds | 3.84% |
| United States Treasury Inflation Indexed Bonds | 3.49% |
| United States Treasury Inflation Indexed Bonds | 3.47% |
| United States Treasury Inflation Indexed Bonds | 3.33% |
| United States Treasury Inflation Indexed Bonds | 2.94% |
AIAYX Prospectus and SEC Filings
Official Inflation-Adjusted Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Intermediate 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.