SDSI Performance — American Century Short Duration Strategic Income ETF
Data updated: 2026-07-29
SDSI returned +1.29% year to date and +5.28% over one year to May 2026. The annualised 3-year return is +5.85%. The fund trailed its Short-Term Corporate Bond category average: $100 invested three years ago grew to $119, against $122 for the category, and to $105 over one year, against $106. Volatility over the past three years was 1.82% a year. In the 12 months to May 2026 the fund took in a net $141.7M, and assets reached $218.37M.
SDSI Growth of $100
What $100 invested in American Century Short Duration Strategic Income ETF grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Corporate Bond category average over the same months.
| Period | SDSI | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $105 | $106 |
| 3 years (Jun 2023 – May 2026) | $119 | $122 |
| Since data start (Oct 2022 – May 2026) | $123 | $128 |
SDSI Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.29% |
| 1 year | +5.28% |
| 3 years (annualised) | +5.85% |
SDSI Annual Returns
Calendar-year total returns of American Century Short Duration Strategic Income ETF, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +1.29% |
| 2025 | +6.51% |
| 2024 | +5.62% |
| 2023 | +6.02% |
| 2022 (Oct–Dec) | +2.21% |
SDSI Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.5% | +0.5% | −0.8% | +0.8% | +0.4% | — | — | — | — | — | — | — |
| 2025 | +0.7% | +0.8% | +0.2% | +0.6% | +0.2% | +0.9% | +0.2% | +1.0% | +0.5% | +0.4% | +0.5% | +0.5% |
| 2024 | +0.6% | −0.3% | +0.6% | −0.3% | +0.9% | +0.6% | +1.3% | +1.0% | +0.9% | −0.6% | +0.5% | +0.2% |
| 2023 | +1.5% | −0.6% | +0.7% | +0.5% | −0.4% | −0.2% | +0.6% | +0.5% | −0.1% | +0.1% | +1.6% | +1.5% |
| 2022 | — | — | — | — | — | — | — | — | — | +0.3% | +1.4% | +0.5% |
SDSI Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 1.82%
- 3-year Sharpe ratio: 0.74 (vs 4.5% risk-free rate)
- Best month: +1.63% (Nov 2023)
- Worst month: −0.79% (Mar 2026)
SDSI Fund Flows
Monthly money in and out of American Century Short Duration Strategic Income ETF, from SEC Form N-PORT.
- 12-month net flow: $141.7M
- 12-month gross sales (incl. reinvestments): $169.9M
- Sales ÷ redemptions: 6.02×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $25.7M | $0 | $25.7M |
| Apr 2026 | $2.6M | $0 | $2.6M |
| Mar 2026 | $15.4M | $0 | $15.4M |
| Feb 2026 | $5.2M | $0 | $5.2M |
| Jan 2026 | $12.9M | $0 | $12.9M |
| Dec 2025 | $28.3M | $0 | $28.3M |
| Nov 2025 | $5.2M | $0 | $5.2M |
| Oct 2025 | $5.2M | $0 | $5.2M |
| Sep 2025 | $51.6M | $18.0M | $33.7M |
| Aug 2025 | $2.6M | $0 | $2.6M |
| Jul 2025 | $2.6M | $0 | $2.6M |
| Jun 2025 | $12.7M | $10.2M | $2.5M |
SDSI Assets Under Management
Net assets of American Century Short Duration Strategic Income ETF by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $218.37M |
| 2026-02-28 | $176.13M |
| 2025-11-30 | $129.34M |
| 2025-08-31 | $85.18M |
| 2025-05-31 | $76.83M |
| 2025-02-28 | $77.10M |
| 2024-11-30 | $71.69M |
| 2024-08-31 | $54.14M |
| 2024-05-31 | $32.98M |
| 2024-02-29 | $30.45M |
| 2023-11-30 | $35.44M |
| 2023-08-31 | $35.37M |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.