TSICX Performance — Thornburg Strategic Income Fund, Class C
Data updated: 2026-08-24
TSICX returned +0.61% year to date and +3.29% over one year to Jun 2026. Annualised returns are +4.75% over 3 years and +1.92% over 5 years. The fund trailed its Intermediate Core Bond category average: $100 invested three years ago grew to $115, against $115 for the category, and to $103 over one year, against $104. Volatility over the past three years was 3.40% a year. In the 12 months to Jun 2026 the fund took in a net $404.7M, and assets reached $10.09B.
TSICX Growth of $100
What $100 invested in Thornburg Strategic Income Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Core Bond category average over the same months.
| Period | TSICX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $103 | $104 |
| 3 years (Jul 2023 – Jun 2026) | $115 | $115 |
| 5 years (Jul 2021 – Jun 2026) | $110 | $102 |
| Since data start (Jul 2019 – Jun 2026) | $121 | $112 |
TSICX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.61% |
| 1 year | +3.29% |
| 3 years (annualised) | +4.75% |
| 5 years (annualised) | +1.92% |
TSICX Annual Returns
Calendar-year total returns of Thornburg Strategic Income Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +0.61% |
| 2025 | +6.48% |
| 2024 | +3.59% |
| 2023 | +6.45% |
| 2022 | −7.16% |
| 2021 | +1.63% |
| 2020 | +7.06% |
| 2019 (Jul–Dec) | +1.78% |
TSICX 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 | +0.2% | +0.9% | −1.4% | +0.4% | +0.2% | +0.2% | — | — | — | — | — | — |
| 2025 | +0.6% | +1.5% | 0.0% | +0.3% | 0.0% | +1.2% | 0.0% | +1.1% | +0.6% | +0.4% | +0.5% | +0.1% |
| 2024 | +0.3% | −0.5% | +0.7% | −1.3% | +1.2% | +0.8% | +1.8% | +1.1% | +1.0% | −1.4% | +0.7% | −0.9% |
| 2023 | +2.2% | −1.1% | +1.4% | +0.4% | −0.3% | +0.1% | +0.5% | −0.1% | −1.3% | −0.8% | +2.9% | +2.4% |
| 2022 | −1.1% | −1.1% | −1.4% | −1.8% | 0.0% | −2.3% | +1.6% | −0.8% | −2.4% | −0.1% | +1.8% | +0.1% |
| 2021 | +0.3% | +0.1% | −0.3% | +0.5% | +0.4% | +0.3% | +0.4% | +0.3% | −0.1% | −0.2% | −0.3% | +0.2% |
| 2020 | +0.7% | +0.2% | −6.7% | +2.7% | +2.8% | +2.1% | +1.8% | +0.8% | +0.3% | +0.3% | +1.4% | +0.8% |
| 2019 | — | — | — | — | — | — | +0.2% | +0.7% | 0.0% | +0.2% | +0.1% | +0.5% |
TSICX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 3.40%
- 3-year Sharpe ratio: 0.07 (vs 4.5% risk-free rate)
- Best month: +2.89% (Nov 2023)
- Worst month: −1.39% (Mar 2026)
TSICX Fund Flows
Monthly money in and out of Thornburg Strategic Income Fund, from SEC Form N-PORT.
- 12-month net flow: $404.7M
- 12-month gross sales (incl. reinvestments): $3.6B
- Sales ÷ redemptions: 1.13×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $252.6M | $307.4M | −$54.7M |
| May 2026 | $257.8M | $225.4M | $32.4M |
| Apr 2026 | $268.8M | $310.5M | −$41.7M |
| Mar 2026 | $287.0M | $393.4M | −$106.4M |
| Feb 2026 | $297.5M | $249.0M | $48.5M |
| Jan 2026 | $341.9M | $366.0M | −$24.1M |
| Dec 2025 | $309.2M | $223.7M | $85.5M |
| Nov 2025 | $268.8M | $226.7M | $42.1M |
| Oct 2025 | $377.4M | $283.6M | $93.8M |
| Sep 2025 | $354.0M | $214.7M | $139.3M |
| Aug 2025 | $268.4M | $194.4M | $74.0M |
| Jul 2025 | $329.5M | $213.5M | $115.9M |
TSICX Assets Under Management
Net assets of Thornburg Strategic Income Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $10.09B |
| 2026-03-31 | $10.16B |
| 2025-12-31 | $10.37B |
| 2025-09-30 | $10.14B |
| 2025-06-30 | $9.73B |
| 2025-03-31 | $9.56B |
| 2024-12-31 | $9.52B |
| 2024-09-30 | $9.43B |
| 2024-06-30 | $8.61B |
| 2024-03-31 | $8.32B |
| 2023-12-31 | $7.78B |
| 2023-09-30 | $6.97B |
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.