SIIDX Performance — Bernstein Intermediate Duration Institutional Portfolio
Data updated: 2025-12-12
SIIDX returned +2.82% over one year to Sep 2025. Annualised returns are +5.29% over 3 years and −0.19% over 5 years. The fund trailed its Intermediate Core Bond category average: $100 invested three years ago grew to $117, against $118 for the category, and to $103 over one year, against $103. Volatility over the past three years was 6.50% a year. In the 12 months to Sep 2025 the fund took in a net $91.4M, and assets reached $853.42M.
SIIDX Growth of $100
What $100 invested in Bernstein Intermediate Duration Institutional Portfolio grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Core Bond category average over the same months.
| Period | SIIDX | Category average |
|---|---|---|
| 1 year (Oct 2024 – Sep 2025) | $103 | $103 |
| 3 years (Oct 2022 – Sep 2025) | $117 | $118 |
| 5 years (Oct 2020 – Sep 2025) | $99 | $101 |
| Since data start (Jul 2019 – Sep 2025) | $108 | $110 |
SIIDX Trailing Returns
Total returns to Sep 2025, from SEC N-PORT.
| Period | Total return |
|---|---|
| 1 year | +2.82% |
| 3 years (annualised) | +5.29% |
| 5 years (annualised) | −0.19% |
SIIDX Annual Returns
Calendar-year total returns of Bernstein Intermediate Duration Institutional Portfolio, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2025 (Jan–Sep) | +6.27% |
| 2024 | +2.15% |
| 2023 | +5.49% |
| 2022 | −13.63% |
| 2021 | −0.89% |
| 2020 | +7.86% |
| 2019 (Jul–Dec) | +2.31% |
SIIDX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | +0.6% | +2.2% | +0.1% | +0.5% | −0.7% | +1.5% | −0.3% | +1.3% | +0.9% | — | — | — |
| 2024 | −0.2% | −1.4% | +1.0% | −2.6% | +1.8% | +2.0% | +2.1% | +1.6% | +1.3% | −2.6% | +1.1% | −1.7% |
| 2023 | +3.1% | −2.4% | +2.0% | +0.8% | −1.1% | −0.5% | +0.1% | −0.7% | −2.7% | −1.6% | +4.5% | +4.1% |
| 2022 | −2.0% | −1.3% | −3.1% | −3.6% | +0.1% | −1.9% | +2.5% | −2.3% | −4.6% | −1.6% | +3.5% | +0.1% |
| 2021 | −0.6% | −1.5% | −0.8% | +0.5% | +0.4% | +0.9% | +1.1% | 0.0% | −0.9% | −0.1% | +0.5% | −0.3% |
| 2020 | +1.9% | +1.6% | −3.6% | +2.4% | +1.5% | +1.4% | +1.6% | −0.3% | +0.2% | −0.3% | +1.1% | +0.3% |
| 2019 | — | — | — | — | — | — | +0.1% | +2.4% | −0.4% | +0.2% | 0.0% | 0.0% |
SIIDX Risk
Risk measures from monthly returns over Oct 2022 – Sep 2025.
- 3-year volatility (annualised): 6.50%
- 3-year Sharpe ratio: 0.12 (vs 4.5% risk-free rate)
- Best month: +4.51% (Nov 2023)
- Worst month: −2.68% (Sep 2023)
SIIDX Fund Flows
Monthly money in and out of Bernstein Intermediate Duration Institutional Portfolio, from SEC Form N-PORT.
- 12-month net flow: $91.4M
- 12-month gross sales (incl. reinvestments): $196.6M
- Sales ÷ redemptions: 1.87×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Sep 2025 | $5.4M | $14.0M | −$8.6M |
| Aug 2025 | $7.1M | $4.7M | $2.4M |
| Jul 2025 | $13.2M | $8.6M | $4.6M |
| Jun 2025 | $9.6M | $5.5M | $4.1M |
| May 2025 | $9.0M | $11.1M | −$2.1M |
| Apr 2025 | $16.8M | $15.1M | $1.7M |
| Mar 2025 | $12.0M | $5.2M | $6.9M |
| Feb 2025 | $36.4M | $9.1M | $27.3M |
| Jan 2025 | $19.9M | $4.1M | $15.8M |
| Dec 2024 | $35.3M | $11.3M | $23.9M |
| Nov 2024 | $19.5M | $8.4M | $11.1M |
| Oct 2024 | $12.5M | $8.2M | $4.3M |
SIIDX Assets Under Management
Net assets of Bernstein Intermediate Duration Institutional Portfolio by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2025-09-30 | $853.42M |
| 2025-06-30 | $847.63M |
| 2025-03-31 | $841.59M |
| 2024-12-31 | $777.10M |
| 2024-09-30 | $770.75M |
| 2024-06-30 | $735.87M |
| 2024-03-31 | $748.64M |
| 2023-12-31 | $715.26M |
| 2023-09-30 | $657.47M |
| 2023-06-30 | $680.14M |
| 2023-03-31 | $687.94M |
| 2022-12-31 | $675.46M |
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.