Guggenheim Core Bond Fund
Actively managed U.S. bond fund
As of its 2026 Q2 report, Guggenheim Core Bond Fund held 1,099 positions with $2.89B in net assets. Its ten largest holdings made up 22.6% of the fund. The SIUSX share class costs 0.76% a year. Over the 12 months to May 2026, SIUSX returned 5.5%, with dividends reinvested. In 2026 Q2 it added 118 new positions and exited 96.
The Guggenheim Core Bond Fund (the Fund) seeks to provide current income.
The fund pursues current income through active management of investment-grade fixed-income securities across diversified sectors, including corporate bonds, mortgage-backed securities, bank loans, and municipal bonds, with intensive credit research and tactical sector allocation to capitalize on relative value opportunities. The fund may invest up to 20% of assets in high-yield securities and employs derivatives and leverage to adjust duration, hedge risks, and enhance returns. Because security selection depends on the Investment Manager's credit analysis and macroeconomic outlook, fund performance will diverge from any benchmark.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
FEDERAL NATIONAL MORTGAGE ASSOCIATION 3.00% · due 2056-08-15 | 3.23% | $93.40M | — |
UNITED STATES OF AMERICA - BUREAU OF THE PUBLIC DEBT 1.75% · due 2041-08-15 | 2.90% | $83.76M | — |
UNITED STATES OF AMERICA - BUREAU OF THE PUBLIC DEBT 1.25% · due 2031-04-15 | 2.86% | $82.84M | — |
UNITED STATES OF AMERICA - BUREAU OF THE PUBLIC DEBT 3.63% · due 2028-03-31 | 2.32% | $67.22M | — |
UNITED STATES OF AMERICA - BUREAU OF THE PUBLIC DEBT 4.00% · due 2032-07-31 | 2.21% | $64.06M | — |
FEDERAL NATIONAL MORTGAGE ASSOCIATION 2.50% · due 2056-08-15 | 2.08% | $60.14M | — |
UNITED STATES OF AMERICA - BUREAU OF THE PUBLIC DEBT 1.88% · due 2035-07-15 | 1.85% | $53.49M | — |
FEDERAL HOME LOAN MORTGAGE CORP 5.50% · due 2056-04-01 | 1.82% | $52.75M | — |
UNITED STATES OF AMERICA - BUREAU OF THE PUBLIC DEBT 3.63% · due 2030-12-31 | 1.69% | $48.82M | — |
DREYFUS TREASURY SECURITIES CASH MANAGEMENT | 1.66% | $48.08M | — |
The 200 largest of 1,099 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 | 55.27% |
| Securitized | 48.21% |
| Loans | 1.86% |
| Cash & short-term | 1.76% |
| 2 smaller | 0.15% |
These positions come to 107.25% 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%.
Derivatives are shown at market value, not notional exposure.
How it has done
SIUSX share class · total returns with dividends reinvested
Volatility over the last 12 months: 3.41%. 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 4 share classes hold the same portfolio
| Share class | Expense ratio | 1 year | 3 years | 5 years | Worst fall |
|---|---|---|---|---|---|
| 0.76% | +5.45% | +14.25% | +0.47% | -4.89% | |
| 1.51% | +4.68% | +11.78% | -3.14% | -5.21% | |
| 0.47% | +5.70% | +15.27% | +1.97% | -4.78% | |
| 0.76% | +5.37% | +14.23% | +0.38% | -4.89% |
These classes hold the same portfolio, so the 5.11pp spread over 5 years is the cost difference between them — roughly 1.02pp a year — not a difference in what they own.
Fees & fund details
Guggenheim Core Bond 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
- 0.47% – 1.51%· SIUSX 0.76%
- Portfolio turnover
- 53.00% a year · as of 2026 Q1
Net is what a holder pays after the adviser's contractual waiver; gross is before it. A waiver can expire.
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.
118 new· the largest 3
96 exited· the largest 3
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 | 76.7% |
| Floating rate | 20.8% |
| Zero-coupon or unclassified | 2.5% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 0.9% |
| 1-3y | 4.5% |
| 3-5y | 8.5% |
| 5-10y | 21.2% |
| 10y+ | 62.5% |
| Unknown | 2.4% |
Based on what filers reported; a filer that never reported a flag also reads as none.
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 nearly 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 | 59% |
| Credit spreads | 41% |
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 | +4.02 yr |
| High yield | +0.10 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 | 0.02 yr | 0% |
| 1 yr | 0.88 yr | 15% |
| 5 yr | 1.68 yr | 28% |
| 10 yr | 2.47 yr | 41% |
| 30 yr | 1.00 yr | 17% |
| 3 mo | 0.13 yr | 3% |
| 1 yr | 0.44 yr | 11% |
| 5 yr | 1.38 yr | 33% |
| 10 yr | 1.56 yr | 38% |
| 30 yr | 0.61 yr | 15% |
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 | +0.02 | +0.12 | +0.00 | $35.5k | $803 |
| 1 yr | +0.88 | +0.44 | +0.01 | $125.9k | $2.3k |
| 5 yr | +1.68 | +1.32 | +0.06 | $382.9k | $16.6k |
| 10 yr | +2.47 | +1.55 | +0.02 | $447.1k | $5.1k |
| 30 yr | +1.00 | +0.60 | +0.02 | $172.6k | $4.4k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
Understand how this fund fits with the rest.
Explore shared holdings, compare funds and follow their businesses with your connected AI:
- “Where do my funds overlap — SIUSX, QQQ and the fund in my 401(k)?”
- “How do this fund’s ten biggest holdings stack up against each other?”
- “For my target-date fund, what’s the real stock-and-bond mix once you look through it?”