MUIIX — Ultra Short Income Portfolio, Institutional Class Shares
Data updated: 2026-08-21
MUIIX — Ultra Short Income Portfolio, Institutional Class Shares. 0.30% expense ratio · since 2016. Holdings, fees, performance and SEC filings.
MUIIX Fund Overview
MUIIX — Ultra Short Income Portfolio, Institutional Class Shares is a US mutual fund managed by Morgan Stanley Investment Management Inc., categorised as Trading - Leveraged. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Adviser: Morgan Stanley Investment Management Inc.
- Trust: Morgan Stanley Institutional Fund Trust
- Category: Trading - Leveraged
- Minimum investment: $5 million
- Inception date: April 28, 2016
- Assets under management: $19.61B
- 1-year return: 4.0%
- Ticker: MUIIX
- SEC CIK: 0000741375
- SEC series ID: S000052013
- Share class ID: C000163598
- FIGI: BBG00CXM15N0
- LEI: 549300VKXQ43E825GB59
About MUIIX
Ultra-Short Income Portfolio (MUIIX) seeks current income with capital preservation while maintaining liquidity. The fund invests primarily in liquid, high-quality U.S. dollar-denominated money market instruments of U.S. and foreign issuers, including U.S. Government obligations, and at least 25% of its total assets in financial services companies. It is not a money market fund and does not seek to maintain a stable net asset value per share. Its Institutional Class Shares, launched April 28, 2016, cost 0.30% a year net (0.35% gross less a 0.05% fee waiver) and returned 4.0% in the 12 months to June 30, 2026, based on monthly returns reported to the SEC on Form N-PORT, with 0.3% volatility.
MUIIX Holdings
Top 10 holdings of Ultra Short Income Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Credit Indust Et Comm Ny | 2.62% |
| JPMorgan Securities LLC | 2.29% |
| Citigroup Global Markets | 2.03% |
| National Bank of Canada | 1.79% |
| Sumitomo Mitsui Banking | 1.53% |
| JPMorgan Securities LLC | 1.53% |
| Wells Fargo Securities LLC | 1.48% |
| Protective Life Global | 1.34% |
| TD Securities USA LLC | 1.34% |
| UBS AG/London | 1.28% |
MUIIX Portfolio Allocation
Asset-class allocation of Ultra Short Income Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Cash & Equivalents | 85.3% |
| Fixed Income | 15.1% |
MUIIX Performance
Total returns for MUIIX through June 2026, from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.79% |
| 1 year | 3.96% |
| 3 years (annualised) | 4.92% |
| 5 years (annualised) | 3.78% |
MUIIX Risk Information
Risk metrics for MUIIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 0.25%
MUIIX Costs and Fees
MUIIX costs about $30 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.30%
- Gross expense ratio: 0.35%
- Portfolio turnover: 0%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
MUIIX Cashflows
Over the 12 months to 2026-06, Ultra Short Income Portfolio had net inflows of $5.36B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $304.95M |
| 2026-05 | $715.70M |
| 2026-04 | $428.11M |
| 2026-03 | −$66.76M |
| 2026-02 | $711.38M |
| 2026-01 | $678.65M |
MUIIX Debt Constituents
Largest debt holdings of Ultra Short Income Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Citigroup Global Markets | 2.03% |
| Protective Life Global | 1.34% |
| Sumitomo Mitsui Finl Grp | 1.06% |
| Mizuho Markets Cayman | 1.02% |
| Mizuho Markets Cayman | 0.96% |
| Mizuho Markets Cayman | 0.77% |
| Toronto-Dominion Bank | 0.75% |
| American Honda Finance | 0.64% |
| Bmw US Capital LLC | 0.61% |
| American Honda Finance | 0.48% |
MUIIX Prospectus and SEC Filings
Official Ultra Short Income Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-28
- Prospectus (485BPOS) — filed 2025-01-28
- Prospectus (497) — filed 2025-01-31
- Portfolio holdings (N-PORT) — filed 2026-08-21
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2025-12-09
- Annual census (N-CEN) — filed 2024-12-10
MUIIX Service Providers
Firms that manage, distribute, hold, administer and audit Ultra Short Income Portfolio, as reported on SEC Form N-CEN, fiscal year ending September 30, 2025.
- Adviser: Morgan Stanley Investment Management Inc.
- Distributor: Morgan Stanley Distribution, Inc.
- Custodian: State Street Bank and Trust Company
- Transfer agents: Morgan Stanley Services Company Inc. and SS&C GIDS, Inc.
- Administrator: Morgan Stanley Investment Management Inc.
- Auditor: Ernst & Young LLP
- Securities lending agent: State Street Bank and Trust Company
Related Funds
Other Trading - Leveraged funds tracked on ABC INVEST:
MUIIX: Frequently Asked Questions
What is the expense ratio of Ultra Short Income Portfolio (MUIIX)?
MUIIX has a net expense ratio of 0.30%, about $30 a year for every $10,000 invested. That is after a 0.05% fee waiver on a gross ratio of 0.35%. MUIIX fees and costs
What is the minimum investment for MUIIX?
The minimum initial investment in MUIIX is $5 million. The fund may waive or reduce these minimums. Source: the fund's summary prospectus (January 2026).
What are MUIIX's top holdings?
As of June 30, 2026, MUIIX held 235 positions. The largest are Credit Indust Et Comm Ny (2.62%), JPMorgan Securities LLC (2.29%), Citigroup Global Markets (2.03%), National Bank of Canada (1.79%) and Sumitomo Mitsui Banking (1.53%). All MUIIX holdings
Can I download the full list of MUIIX holdings?
Yes. The complete MUIIX holdings list as of June 30, 2026 can be downloaded as a CSV file from the Holdings page: holding, ticker, FIGI, sector, country, asset type, shares, value and share of net assets, from the fund's SEC N-PORT filing. Download MUIIX holdings (CSV)
How has Ultra Short Income Portfolio performed?
MUIIX returned +4.0% over the 12 months to June 2026, +4.9% a year over 3 years and +3.8% a year over 5 years. MUIIX performance and risk
How large is MUIIX?
MUIIX manages $19.61B (SEC N-PORT, June 2026). Investors added a net $5.36B over the past 12 months.
Who manages MUIIX and when did it launch?
MUIIX is managed by Morgan Stanley Investment Management Inc.. It is a series of Morgan Stanley Institutional Fund Trust. It launched on April 28, 2016.
How does MUIIX compare with similar Trading - Leveraged funds?
Among 206 Trading - Leveraged funds with $100M+ in assets, MUIIX ranks #44 of 205 on net expense ratio (0.30%) and #5 of 206 by assets. The largest is JPMorgan Ultra-Short Income ETF (JPST). Compare MUIIX with JPST
Where can I find MUIIX's prospectus and SEC filings?
MUIIX's latest prospectus (485BPOS) was filed January 28, 2026 and its latest N-PORT holdings report was filed August 21, 2026. All 52 filings are linked on ABC INVEST and on SEC EDGAR (series S000052013). MUIIX SEC filings
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, and annual data from Form N-CEN.
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.