SDSI — American Century Short Duration Strategic Income ETF
Data updated: 2026-07-29
SDSI — American Century Short Duration Strategic Income ETF data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Short Corporate Bond · $218.37M AUM · 0.32% expense ratio · 5.3% 1-yr return. From SEC regulatory filings.
SDSI Fund Overview
SDSI — American Century Short Duration Strategic Income ETF is a US ETF managed by American Century ETF Trust, categorised as Short Corporate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US ETF
- Manager: American Century ETF Trust
- Category: Short Corporate Bond
- Assets under management: $218.37M
- 1-year return: 5.3%
- Ticker: SDSI
- SEC CIK: 0001710607
- SEC series ID: S000077487
- Share class ID: C000237948
SDSI Holdings
Top 10 holdings of American Century Short Duration Strategic Income ETF by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| State Street Institutional US Government Money Market Fund | 12.26% |
| U.s. Treasury | 10.63% |
| U.s. Treasury | 3.65% |
| U.s. Treasury | 3.41% |
| U.s. Treasury | 2.31% |
| State Street Navigator Securities Lending Trust - State Street Navigator Securities Lending Government Money Market Portfolio | 0.72% |
| Riverspring Hlth Senior | 0.58% |
| CMS Energy Corp | 0.56% |
| PMT Loan Trust 2025-CNF1 | 0.55% |
| Northern Trust Corp | 0.54% |
SDSI Portfolio Allocation
Asset-class allocation of American Century Short Duration Strategic Income ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 64.9% |
| Securitized | 24.0% |
| Cash & Equivalents | 13.0% |
| Equity | 9.7% |
| Loans | 0.1% |
SDSI Performance
Total returns for SDSI (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.3% |
| 1 year | 5.3% |
| 3 years (annualised) | 5.8% |
SDSI Risk Information
Risk metrics for SDSI, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 1.6%
SDSI Costs and Fees
SDSI costs about $32 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.32%
- Gross expense ratio: 0.32%
- Portfolio turnover: 188%
- Brokerage commissions: 0.75 bps of average net assets (SEC N-CEN)
SDSI Cashflows
Over the 12 months to 2026-02, American Century Short Duration Strategic Income ETF had net inflows of $98.06M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $5.18M |
| 2026-01 | $12.90M |
| 2025-12 | $28.31M |
| 2025-11 | $5.16M |
| 2025-10 | $5.16M |
| 2025-09 | $33.67M |
SDSI Debt Constituents
Largest debt holdings of American Century Short Duration Strategic Income ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| U.s. Treasury | 10.63% |
| U.s. Treasury | 3.65% |
| U.s. Treasury | 3.41% |
| U.s. Treasury | 2.31% |
| Riverspring Hlth Senior | 0.58% |
| CMS Energy Corp | 0.56% |
| Northern Trust Corp | 0.54% |
| Global Atlantic Fin Co | 0.52% |
| Expand Energy Corp | 0.51% |
| United Airlines Inc | 0.51% |
SDSI Prospectus and SEC Filings
Official American Century Short Duration Strategic Income ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Short Corporate 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.