SIIDX — Bernstein Intermediate Duration Institutional Portfolio
Data updated: 2025-12-12
SIIDX — Bernstein Intermediate Duration Institutional Portfolio data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Total / Aggregate Bond · $853.42M AUM · 0.45% expense ratio · 2.8% 1-yr return. From SEC regulatory filings.
SIIDX Fund Overview
SIIDX — Bernstein Intermediate Duration Institutional Portfolio is a US mutual fund managed by Bernstein Sanford C Fund II INC, 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: Bernstein Sanford C Fund II INC
- Category: Long Total / Aggregate Bond
- Assets under management: $853.42M
- 1-year return: 2.8%
- Ticker: SIIDX
- SEC CIK: 0001166729
- SEC series ID: S000011063
- Share class ID: C000030507
SIIDX Holdings
Top 10 holdings of Bernstein Intermediate Duration Institutional Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury | 5.72% |
| Alliance Bernstein | 4.04% |
| United States Treasury | 3.01% |
| United States Treasury | 2.59% |
| United States Treasury | 2.21% |
| United States Treasury | 2.03% |
| Umbs, Tba | 1.89% |
| United States Treasury | 1.60% |
| United States Treasury | 1.53% |
| Government National Mortgage Association | 1.46% |
SIIDX Portfolio Allocation
Asset-class allocation of Bernstein Intermediate Duration Institutional Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 60.3% |
| Securitized | 34.8% |
| Cash & Equivalents | 15.4% |
| Real Estate | 0.2% |
SIIDX Performance
Total returns for SIIDX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| 1 year | 2.8% |
| 3 years (annualised) | 5.3% |
| 5 years (annualised) | -0.2% |
SIIDX Risk Information
Risk metrics for SIIDX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 4.8%
SIIDX Costs and Fees
SIIDX costs about $45 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.45%
- Gross expense ratio: 0.52%
- Portfolio turnover: 206%
- Brokerage commissions: 0.30 bps of average net assets (SEC N-CEN)
SIIDX Cashflows
Over the 12 months to 2025-09, Bernstein Intermediate Duration Institutional Portfolio had net inflows of $91.40M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2025-09 | −$8.65M |
| 2025-08 | $2.38M |
| 2025-07 | $4.58M |
| 2025-06 | $4.12M |
| 2025-05 | −$2.06M |
| 2025-04 | $1.68M |
SIIDX Debt Constituents
Largest debt holdings of Bernstein Intermediate Duration Institutional Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 2.21% |
| United States Treasury | 2.03% |
| United States Treasury | 1.60% |
| United States Treasury | 1.53% |
| United States Treasury | 1.46% |
| Federal Home Loan Bank | 1.25% |
| United States Treasury | 1.25% |
| United States Treasury | 1.20% |
| United States Treasury | 1.05% |
| United States Treasury | 0.99% |
SIIDX Prospectus and SEC Filings
Official Bernstein Intermediate Duration Institutional Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
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.