CSTBX Performance — Calamos Short-Term Bond Fund, Class A
Data updated: 2026-09-29
CSTBX returned +0.91% year to date and +3.38% over one year to Jul 2026. Annualised returns are +4.87% over 3 years and +2.49% over 5 years. The fund trailed its Short-Term Corporate Bond category average: $100 invested three years ago grew to $115, against $120 for the category, and to $103 over one year, against $104. Volatility over the past three years was 1.72% a year. In the 12 months to Jul 2026 the fund took in a net $28.4M, and assets reached $415.32M.
CSTBX Growth of $100
What $100 invested in Calamos Short-Term Bond Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Corporate Bond category average over the same months.
| Period | CSTBX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $103 | $104 |
| 3 years (Aug 2023 – Jul 2026) | $115 | $120 |
| 5 years (Aug 2021 – Jul 2026) | $113 | $116 |
| Since data start (Aug 2019 – Jul 2026) | $120 | $127 |
CSTBX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.91% |
| 1 year | +3.38% |
| 3 years (annualised) | +4.87% |
| 5 years (annualised) | +2.49% |
CSTBX Annual Returns
Calendar-year total returns of Calamos Short-Term Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +0.91% |
| 2025 | +5.85% |
| 2024 | +4.63% |
| 2023 | +5.40% |
| 2022 | −3.38% |
| 2021 | −0.13% |
| 2020 | +3.91% |
| 2019 (Aug–Dec) | +1.33% |
CSTBX 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% | +0.6% | −0.6% | +0.4% | +0.2% | +0.1% | −0.1% | — | — | — | — | — |
| 2025 | +0.5% | +0.8% | +0.4% | +0.5% | +0.3% | +0.9% | +0.1% | +0.9% | +0.4% | +0.4% | +0.6% | +0.2% |
| 2024 | +0.3% | −0.2% | +0.5% | −0.3% | +0.8% | +0.6% | +1.2% | +0.9% | +0.8% | −0.6% | +0.6% | 0.0% |
| 2023 | +1.2% | −0.7% | +1.0% | +0.6% | −0.3% | −0.1% | +0.5% | +0.4% | −0.3% | 0.0% | +1.6% | +1.5% |
| 2022 | −0.8% | −0.4% | −1.2% | −0.7% | +0.4% | −1.1% | +1.1% | −0.7% | −1.2% | −0.1% | +1.2% | +0.4% |
| 2021 | +0.2% | −0.1% | −0.2% | +0.2% | +0.2% | −0.1% | +0.2% | 0.0% | −0.1% | −0.4% | −0.1% | 0.0% |
| 2020 | +0.7% | +0.5% | −2.4% | +1.3% | +0.8% | +1.0% | +0.8% | +0.3% | 0.0% | +0.2% | +0.4% | +0.4% |
| 2019 | — | — | — | — | — | — | — | +0.7% | 0.0% | +0.4% | 0.0% | +0.2% |
CSTBX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 1.72%
- 3-year Sharpe ratio: 0.21 (vs 4.5% risk-free rate)
- Best month: +1.57% (Nov 2023)
- Worst month: −0.58% (Mar 2026)
CSTBX Fund Flows
Monthly money in and out of Calamos Short-Term Bond Fund, from SEC Form N-PORT.
- 12-month net flow: $28.4M
- 12-month gross sales (incl. reinvestments): $54.4M
- Sales ÷ redemptions: 2.09×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $9.6M | $6.8M | $2.8M |
| Jun 2026 | $2.1M | $2.8M | −$711K |
| May 2026 | $1.8M | $723K | $1.1M |
| Apr 2026 | $1.2M | $1.3M | −$56K |
| Mar 2026 | $1.6M | $1.1M | $459K |
| Feb 2026 | $1.7M | $598K | $1.1M |
| Jan 2026 | $2.7M | $847K | $1.9M |
| Dec 2025 | $2.6M | $999K | $1.6M |
| Nov 2025 | $2.7M | $519K | $2.2M |
| Oct 2025 | $2.9M | $843K | $2.1M |
| Sep 2025 | $21.5M | $946K | $20.6M |
| Aug 2025 | $3.9M | $8.5M | −$4.6M |
CSTBX Assets Under Management
Net assets of Calamos Short-Term Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $415.32M |
| 2026-04-30 | $414.99M |
| 2026-01-31 | $416.61M |
| 2025-10-31 | $410.74M |
| 2025-07-31 | $390.80M |
| 2025-04-30 | $386.11M |
| 2025-01-31 | $371.51M |
| 2024-10-31 | $366.91M |
| 2024-07-31 | $366.14M |
| 2024-04-30 | $361.07M |
| 2024-01-31 | $364.57M |
| 2023-10-31 | $357.56M |
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.