CSTBX — Calamos Short-Term Bond Fund
Data updated: 2026-06-26
CSTBX — Calamos Short-Term Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Short Corporate Bond · $414.99M AUM · 0.64% expense ratio · 4.3% 1-yr return. From SEC regulatory filings.
CSTBX Fund Overview
CSTBX — Calamos Short-Term Bond Fund is a US mutual fund managed by Calamos Investment Trust/il, categorised as Short Corporate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Calamos Investment Trust/il
- Category: Short Corporate Bond
- Assets under management: $414.99M
- 1-year return: 4.3%
- Ticker: CSTBX
- SEC CIK: 0000826732
- SEC series ID: S000062995
- Share class ID: C000204432
CSTBX Holdings
Top 10 holdings of Calamos Short-Term Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| State Street Global Advisors | 4.03% |
| United States Treasury | 1.46% |
| United States Treasury | 1.22% |
| Fannie Mae | 0.83% |
| Alloya Auto Receivables Trust | 0.73% |
| United States Treasury | 0.71% |
| United States Treasury | 0.71% |
| Avis Budget Rental Car Funding AESOP LLC | 0.54% |
| Sofi Consumer Loan Program Trust | 0.52% |
| American Express Credit Account Master Trust | 0.50% |
CSTBX Portfolio Allocation
Asset-class allocation of Calamos Short-Term Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 65.1% |
| Securitized | 23.4% |
| Loans | 9.0% |
| Cash & Equivalents | 4.0% |
CSTBX Performance
Total returns for CSTBX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.6% |
| 1 year | 4.3% |
| 3 years (annualised) | 4.8% |
| 5 years (annualised) | 2.5% |
CSTBX Risk Information
Risk metrics for CSTBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 1.3%
CSTBX Costs and Fees
CSTBX costs about $64 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.64%
- Gross expense ratio: 0.64%
- Portfolio turnover: 36%
- Brokerage commissions: 0.05 bps of average net assets (SEC N-CEN)
CSTBX Cashflows
Over the 12 months to 2026-04, Calamos Short-Term Bond Fund had net inflows of $29.66M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | −$56.22K |
| 2026-03 | $458.80K |
| 2026-02 | $1.12M |
| 2026-01 | $1.88M |
| 2025-12 | $1.56M |
| 2025-11 | $2.20M |
CSTBX Debt Constituents
Largest debt holdings of Calamos Short-Term Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 1.46% |
| United States Treasury | 1.22% |
| United States Treasury | 0.71% |
| United States Treasury | 0.71% |
| Asian Development Bank | 0.47% |
| Capital One Financial Co. | 0.30% |
| Crh Smw Finance Dac | 0.27% |
| Eaton Capital Ulc | 0.27% |
| United Air 2019-2 A Ptt | 0.26% |
| Ggam Finance Ltd. | 0.25% |
CSTBX Prospectus and SEC Filings
Official Calamos Short-Term Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Short Corporate Bond funds tracked on ABC INVEST:
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, annual data from Form N-CEN, and shareholder reports from Form N-CSR.