SCOAX — Siit Core Fixed Income Fund
Data updated: 2026-08-14
SCOAX — Siit Core Fixed Income Fund. Long Total / Aggregate Bond · $9.88B AUM · 0.37% expense ratio. Holdings, fees, performance and SEC filings.
SCOAX Fund Overview
SCOAX — Siit Core Fixed Income Fund is a US mutual fund managed by Sei Institutional Investments Trust, categorised as Long Total / Aggregate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Sei Institutional Investments Trust
- Category: Long Total / Aggregate Bond
- Assets under management: $9.88B
- 1-year return: 5.3%
- Ticker: SCOAX
- SEC CIK: 0000939934
- SEC series ID: S000006766
- Share class ID: C000018355
SCOAX Holdings
Top 10 holdings of Siit Core Fixed Income Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| US 2yr Note (cbt) Sep26 | 4.35% |
| United States of America | 3.42% |
| US 2yr Note (cbt) Sep26 | 3.09% |
| United States of America | 2.64% |
| US 2yr Note (cbt) Sep26 | 2.17% |
| United States of America | 2.10% |
| United States of America | 1.76% |
| United States of America | 1.62% |
| United States of America | 1.20% |
| United States of America | 1.14% |
SCOAX Portfolio Allocation
Asset-class allocation of Siit Core Fixed Income Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 66.9% |
| Other | 23.4% |
| Securitized | 13.0% |
| Real Estate | 12.5% |
| Cash & Equivalents | 5.3% |
SCOAX Performance
Total returns for SCOAX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -1.4% |
| 1 year | 5.3% |
| 3 years (annualised) | 4.2% |
| 5 years (annualised) | 0.3% |
SCOAX Risk Information
Risk metrics for SCOAX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.4%
SCOAX Costs and Fees
SCOAX costs about $37 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.37%
- Gross expense ratio: 0.37%
- Portfolio turnover: 373%
- Brokerage commissions: 0.19 bps of average net assets (SEC N-CEN)
SCOAX Cashflows
Over the 12 months to 2026-05, Siit Core Fixed Income Fund had net inflows of $1.00B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-05 | $69.18M |
| 2026-04 | $42.30M |
| 2026-03 | −$16.71M |
| 2026-02 | $115.34M |
| 2026-01 | $26.19M |
| 2025-12 | $43.32M |
SCOAX Debt Constituents
Largest debt holdings of Siit Core Fixed Income Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States of America | 1.62% |
| Federal National Mortgage Association | 1.08% |
| Federal National Mortgage Association | 0.97% |
| United States of America | 0.82% |
| Federal National Mortgage Association | 0.77% |
| Federal National Mortgage Association | 0.67% |
| United States of America | 0.54% |
| United States of America | 0.54% |
| United States of America | 0.50% |
| United States of America | 0.47% |
SCOAX Prospectus and SEC Filings
Official Siit Core Fixed Income Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-09-26
- Prospectus (485BPOS) — filed 2024-09-27
- Prospectus (485BPOS) — filed 2023-09-28
- Portfolio holdings (N-PORT) — filed 2026-07-29
- Portfolio holdings (N-PORT) — filed 2026-04-28
- Portfolio holdings (N-PORT) — filed 2026-01-28
- Annual census (N-CEN) — filed 2026-08-14
- Annual census (N-CEN) — filed 2025-08-14
Related Funds
Other Long Total / Aggregate 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.