SIMT Core Fixed Income Fund
Actively managed U.S. bond fund
As of its 2026 Q2 report, SIMT Core Fixed Income Fund held 3,004 positions with $3.65B in net assets. Its ten largest holdings made up 32.0% of the fund. The SCXIX share class costs 0.99% a year. Over the 12 months to May 2026, SCXIX returned 3.5%, with dividends reinvested. In 2026 Q2 it added 319 new positions and exited 401.
Current income consistent with the preservation of capital.
The fund employs multiple sub-advisers with differing investment philosophies to manage a portfolio of fixed income securities spanning investment-grade corporates and government bonds, mortgage-backed securities, bank loans, and non-investment-grade debt, with each sub-adviser making independent security selections based on yield, credit ratings and other factors under the general supervision of SEI Investments Management Corporation. The fund may also use derivatives including futures, swaps, and credit default swaps to adjust interest rate and credit exposure, take long and short currency positions, and manage overall portfolio risk. Because each sub-adviser independently selects securities of different types and maturities, the fund's actual composition and performance may diverge from the broad U.S. fixed income market, though the fund targets a dollar-weighted average duration consistent with the Bloomberg U.S. Aggregate Bond Index.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
GOLDMAN, SACHS & CO. | 8.71% | $317.44M | — |
United States of America 4.13% · due 2031-05-31 | 4.27% | $155.78M | — |
United States of America | 4.20% | $153.08M | — |
N/A | 3.69% | $134.76M | — |
United States of America 4.00% · due 2028-05-31 | 2.90% | $105.66M | — |
United States of America 4.38% · due 2036-05-15 | 1.79% | $65.25M | — |
United States of America 5.00% · due 2056-05-15 | 1.76% | $64.34M | — |
United States of America 5.00% · due 2046-05-15 | 1.71% | $62.28M | — |
Federal National Mortgage Association 3.50% · due 2056-07-15 | 1.51% | $54.95M | — |
United States of America 4.13% · due 2028-06-30 | 1.42% | $51.66M | — |
The 200 largest of 3,004 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Bonds | 90.84% |
| Securitized | 12.71% |
| Derivatives | 11.06% |
| Cash & short-term | 3.69% |
| 2 smaller | 0.45% |
| Other | -0.38% |
These positions come to 118.38% of the fund's net assets. This counts only what the fund reported holding — the holdings disclosure covers assets, not liabilities such as borrowings — so it is not expected to reconcile to 100%.
The outer band is exposure held short — written against the portfolio rather than part of it, which is why it sits outside the ring and why the two are never netted into one figure.
Derivatives are shown at market value, not notional exposure.
By sector
- Government
- 59.0%
- Other
- 16.2%
- Securitized
- 10.4%
- Financials
- 3.2%
- 12 other sectors
- 11.2%
- Government
- 59.0%
- Other
- 16.2%
- Securitized
- 10.4%
- Financials
- 3.2%
- Cash
- 3.0%
- Utilities
- 2.0%
- Information Technology
- 1.3%
- Communication Services
- 1.1%
- Industrials
- 1.0%
- Health Care
- 0.9%
- International
- 0.6%
- Consumer Discretionary
- 0.4%
- Energy
- 0.3%
- Real Estate
- 0.3%
- Consumer Staples
- 0.2%
- Materials
- 0.1%
How it has done
SCXIX share class · total returns with dividends reinvested
Volatility over the last 12 months: 3.17%. Past returns are a record, not a forecast.
Jun 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
The 3 share classes hold the same portfolio
| Share class | Expense ratio | 1 year | 3 years | 5 years | Worst fall |
|---|---|---|---|---|---|
| 0.99% | +3.51% | +11.82% | -2.86% | -3.69% | |
| 0.74% | +3.63% | +12.56% | -1.84% | -3.67% | |
| 0.49% | +3.89% | +13.28% | -0.62% | -3.61% |
These classes hold the same portfolio, so the 2.23pp spread over 5 years is the cost difference between them — roughly 0.45pp a year — not a difference in what they own.
Fees & fund details
SIMT Core Fixed Income Fund is an actively managed U.S. bond fund.
- Asset class
- Bonds
- Region
- United States
- Management
- Actively managed
- Fund type
- Open-end fund
- Credit quality
- Investment grade
- Rate sensitivity
- Intermediate duration
- Expense ratio, by class
- 0.49% – 0.99%· SCXIX 0.99%
- Portfolio turnover
- 394.00% a year · as of 2026 Q1
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
319 new· the largest 3
401 exited· the largest 4
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-06-30
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 90.1% |
| Floating rate | 9.3% |
| Zero-coupon or unclassified | 0.5% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 1.1% |
| 1-3y | 14.5% |
| 3-5y | 13.2% |
| 5-10y | 15.9% |
| 10y+ | 55.4% |
These three overlap — one holding can be in arrears and paying in kind at once — so they are shown separately and never summed.
Risk profile
Interest-rate and credit-spread sensitivity, both in years · as of 2026Q2
Most of this fund’s sensitivity is to interest rates, with credit spreads carrying about half as much.
Where the loss would come from. The two shocks are the same size, so this is the balance of the fund's two sensitivities rather than a bet on one moving more.
| Interest rates | 61% |
| Credit spreads | 39% |
Filers report the impact of a 0.01% move only, so the total is our own scaling of that one number and overstates the loss on most bonds — read it as approximate, never as precise. The two sensitivities overlap rather than add up: they measure the same positions against different shocks, which is why the durations above are shown side by side and never summed.
Share of the fund's spread duration carried by each credit tier.
| Investment grade | +3.31 yr |
| High yield | +0.54 yr |
Share of duration at each point, shortest first. A positive figure loses value when spreads widen; a negative one offsets — a credit hedge.
| 3 mo | 0.01 yr | 0% |
| 1 yr | 0.63 yr | 10% |
| 5 yr | 1.75 yr | 29% |
| 10 yr | 2.39 yr | 40% |
| 30 yr | 1.24 yr | 21% |
| 3 mo | 0.02 yr | 1% |
| 1 yr | 0.40 yr | 10% |
| 5 yr | 1.21 yr | 31% |
| 10 yr | 1.68 yr | 44% |
| 30 yr | 0.55 yr | 14% |
The two bands measure the same positions against different shocks and do not add — a Treasury carries rate duration and no spread duration, a floating-rate credit the reverse. Rate tenors are also summed across every currency the fund discloses.
Show the numbers
| Tenor | Rate yrs | IG yrs | HY yrs | IG $/bp | HY $/bp |
|---|---|---|---|---|---|
| 3 mo | +0.01 | +0.02 | +0.00 | $6.4k | $1.4k |
| 1 yr | +0.63 | +0.32 | +0.08 | $116.2k | $28.7k |
| 5 yr | +1.75 | +1.02 | +0.19 | $372.4k | $69.5k |
| 10 yr | +2.39 | +1.46 | +0.22 | $533.4k | $79.8k |
| 30 yr | +1.24 | +0.49 | +0.05 | $180.0k | $19.2k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
Duration contribution in years, summing to the fund's 6.02 yr.
This is where the fund's rate exposure sits, not its currency risk — most international bond funds hedge the currency back to dollars, and the size of those hedges is not in the filing. Tenors are also summed across curves, so a 5-year JPY point and a 5-year USD point are added together.
Understand how this fund fits with the rest.
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