ARMLX Performance — Western Asset Ultra-Short Income Fund, Class IS
Data updated: 2026-09-24
ARMLX returned +1.85% year to date and +5.01% over one year to May 2026. Annualised returns are +5.94% over 3 years and +3.88% over 5 years. The fund trailed its Trading - Leveraged category average: $100 invested three years ago grew to $119, against $173 for the category, and to $105 over one year, against $137. Volatility over the past three years was 0.61% a year. In the 12 months to May 2026 the fund took in a net $65.4M, and assets reached $478.97M.
ARMLX Growth of $100
What $100 invested in Western Asset Ultra-Short Income Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Trading - Leveraged category average over the same months.
| Period | ARMLX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $105 | $137 |
| 3 years (Jun 2023 – May 2026) | $119 | $173 |
| 5 years (Jun 2021 – May 2026) | $121 | $155 |
| Since data start (Sep 2019 – May 2026) | $125 | $181 |
ARMLX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.85% |
| 1 year | +5.01% |
| 3 years (annualised) | +5.94% |
| 5 years (annualised) | +3.88% |
ARMLX Annual Returns
Calendar-year total returns of Western Asset Ultra-Short Income Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +1.85% |
| 2025 | +5.13% |
| 2024 | +6.36% |
| 2023 | +6.89% |
| 2022 | −0.66% |
| 2021 | +0.49% |
| 2020 | +1.78% |
| 2019 (Sep–Dec) | +1.01% |
ARMLX 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 | +0.4% | +0.3% | +0.1% | +0.5% | +0.5% | — | — | — | — | — | — | — |
| 2025 | +0.4% | +0.4% | +0.3% | +0.2% | +0.6% | +0.4% | +0.5% | +0.5% | +0.4% | +0.5% | +0.3% | +0.5% |
| 2024 | +0.7% | +0.4% | +0.5% | +0.4% | +0.6% | +0.3% | +0.8% | +0.5% | +0.7% | +0.3% | +0.5% | +0.4% |
| 2023 | +1.2% | +0.3% | 0.0% | +0.6% | +0.3% | +0.7% | +0.8% | +0.4% | +0.3% | +0.3% | +1.0% | +0.8% |
| 2022 | −0.3% | −0.6% | −0.4% | −0.4% | −0.1% | −0.7% | +0.8% | +0.2% | −0.5% | 0.0% | +1.0% | +0.4% |
| 2021 | +0.4% | 0.0% | −0.1% | +0.1% | +0.1% | +0.1% | 0.0% | 0.0% | +0.1% | −0.1% | −0.2% | +0.2% |
| 2020 | +0.3% | −0.1% | −4.9% | +2.4% | +1.2% | +1.1% | +0.6% | +0.4% | +0.1% | +0.2% | +0.3% | +0.2% |
| 2019 | — | — | — | — | — | — | — | — | +0.3% | +0.3% | +0.2% | +0.2% |
ARMLX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 0.61%
- 3-year Sharpe ratio: 2.36 (vs 4.5% risk-free rate)
- Best month: +1.04% (Nov 2023)
- Worst month: +0.14% (Mar 2026)
ARMLX Fund Flows
Monthly money in and out of Western Asset Ultra-Short Income Fund, from SEC Form N-PORT.
- 12-month net flow: $65.4M
- 12-month gross sales (incl. reinvestments): $282.2M
- Sales ÷ redemptions: 1.30×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $21.0M | $13.4M | $7.6M |
| Apr 2026 | $21.2M | $15.6M | $5.6M |
| Mar 2026 | $36.0M | $24.1M | $12.0M |
| Feb 2026 | $45.7M | $16.6M | $29.1M |
| Jan 2026 | $23.0M | $18.4M | $4.6M |
| Dec 2025 | $26.0M | $24.7M | $1.2M |
| Nov 2025 | $24.2M | $10.5M | $13.8M |
| Oct 2025 | $21.7M | $18.9M | $2.8M |
| Sep 2025 | $17.5M | $17.2M | $361K |
| Aug 2025 | $17.6M | $13.0M | $4.6M |
| Jul 2025 | $15.6M | $18.7M | −$3.1M |
| Jun 2025 | $12.7M | $25.9M | −$13.2M |
ARMLX Assets Under Management
Net assets of Western Asset Ultra-Short Income Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-29 | $478.97M |
| 2026-02-27 | $453.81M |
| 2025-11-28 | $417.95M |
| 2025-08-29 | $400.20M |
| 2025-05-30 | $410.22M |
| 2025-02-28 | $448.17M |
| 2024-11-29 | $463.75M |
| 2024-08-30 | $443.86M |
| 2024-05-31 | $445.98M |
| 2024-02-29 | $431.29M |
| 2023-11-30 | $436.41M |
| 2023-08-31 | $418.63M |
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.