MUAIX Performance — Ultra Short Income Portfolio, Class A
Data updated: 2026-08-21
MUAIX returned +1.73% year to date and +3.97% over one year to Jun 2026. Annualised returns are +4.84% over 3 years and +3.70% over 5 years. The fund trailed its Trading - Leveraged category average: $100 invested three years ago grew to $115, against $157 for the category, and to $104 over one year, against $121. Volatility over the past three years was 0.28% a year. In the 12 months to Jun 2026 the fund took in a net $5.4B, and assets reached $19.61B.
MUAIX Growth of $100
What $100 invested in Ultra Short Income Portfolio grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Trading - Leveraged category average over the same months.
| Period | MUAIX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $104 | $121 |
| 3 years (Jul 2023 – Jun 2026) | $115 | $157 |
| 5 years (Jul 2021 – Jun 2026) | $120 | $144 |
| Since data start (Jul 2019 – Jun 2026) | $121 | $165 |
MUAIX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.73% |
| 1 year | +3.97% |
| 3 years (annualised) | +4.84% |
| 5 years (annualised) | +3.70% |
MUAIX Annual Returns
Calendar-year total returns of Ultra Short Income Portfolio, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +1.73% |
| 2025 | +4.36% |
| 2024 | +5.37% |
| 2023 | +5.51% |
| 2022 | +1.60% |
| 2021 | +0.01% |
| 2020 | +0.27% |
| 2019 (Jul–Dec) | +1.01% |
MUAIX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.3% | +0.3% | +0.2% | +0.3% | +0.3% | +0.3% | — | — | — | — | — | — |
| 2025 | +0.4% | +0.4% | +0.4% | +0.3% | +0.4% | +0.4% | +0.4% | +0.4% | +0.4% | +0.4% | +0.3% | +0.3% |
| 2024 | +0.5% | +0.4% | +0.4% | +0.4% | +0.5% | +0.4% | +0.5% | +0.5% | +0.4% | +0.4% | +0.4% | +0.4% |
| 2023 | +0.5% | +0.4% | +0.3% | +0.5% | +0.4% | +0.3% | +0.5% | +0.5% | +0.4% | +0.5% | +0.5% | +0.6% |
| 2022 | 0.0% | −0.1% | 0.0% | 0.0% | +0.1% | +0.1% | +0.1% | +0.2% | +0.2% | +0.2% | +0.3% | +0.5% |
| 2021 | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| 2020 | +0.1% | +0.1% | −0.5% | +0.3% | +0.2% | 0.0% | 0.0% | 0.0% | 0.0% | −0.1% | 0.0% | 0.0% |
| 2019 | — | — | — | — | — | — | +0.2% | +0.2% | +0.2% | +0.2% | +0.1% | +0.1% |
MUAIX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 0.28%
- Best month: +0.57% (Dec 2023)
- Worst month: +0.21% (Mar 2026)
MUAIX Fund Flows
Monthly money in and out of Ultra Short Income Portfolio, from SEC Form N-PORT.
- 12-month net flow: $5.4B
- 12-month gross sales (incl. reinvestments): $25.4B
- Sales ÷ redemptions: 1.27×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $2.9B | $2.6B | $304.9M |
| May 2026 | $2.4B | $1.7B | $715.7M |
| Apr 2026 | $2.2B | $1.8B | $428.1M |
| Mar 2026 | $2.2B | $2.2B | −$66.8M |
| Feb 2026 | $2.4B | $1.7B | $711.4M |
| Jan 2026 | $2.1B | $1.4B | $678.7M |
| Dec 2025 | $3.3B | $2.5B | $841.4M |
| Nov 2025 | $1.8B | $1.3B | $552.7M |
| Oct 2025 | $1.4B | $1.1B | $351.7M |
| Sep 2025 | $1.5B | $1.3B | $149.8M |
| Aug 2025 | $1.5B | $1.2B | $346.8M |
| Jul 2025 | $1.6B | $1.2B | $348.1M |
MUAIX Assets Under Management
Net assets of Ultra Short Income Portfolio by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $19.61B |
| 2026-03-31 | $18.17B |
| 2025-12-31 | $16.86B |
| 2025-09-30 | $15.11B |
| 2025-06-30 | $14.26B |
| 2025-03-31 | $13.30B |
| 2024-12-31 | $11.92B |
| 2024-09-30 | $11.16B |
| 2024-06-30 | $11.19B |
| 2024-03-31 | $11.55B |
| 2023-12-31 | $11.25B |
| 2023-09-30 | $11.16B |
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.