CSIBX — Calvert Bond Fund
Data updated: 2026-08-27
CSIBX — Calvert Bond Fund. Long Total / Aggregate Bond · $4.17B AUM · 0.73% expense ratio · 4.0% 1-yr return. Holdings, fees, performance and SEC filings.
CSIBX Fund Overview
CSIBX — Calvert Bond Fund is a US mutual fund managed by Calvert Social Investment Fund, categorised as Long Total / Aggregate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Calvert Social Investment Fund
- Category: Long Total / Aggregate Bond
- Assets under management: $4.17B
- 1-year return: 4.0%
- Ticker: CSIBX
- SEC CIK: 0000356682
- SEC series ID: S000008718
- Share class ID: C000023758
CSIBX Holdings
Top 10 holdings of Calvert Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Morgan Stanley & Co. LLC | 10.58% |
| Umbs, Tba | 8.54% |
| United States Treasury | 6.77% |
| United States Treasury | 5.07% |
| Umbs, Tba | 3.51% |
| United States Treasury | 2.37% |
| United States Treasury | 2.02% |
| United States Treasury | 1.51% |
| Freddie Mac | 1.49% |
| Nykredit Realkredit A/s | 1.26% |
CSIBX Portfolio Allocation
Asset-class allocation of Calvert Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 50.4% |
| Securitized | 47.5% |
| Cash & Equivalents | 10.6% |
| Loans | 3.3% |
| Equity | 0.2% |
CSIBX Performance
Total returns for CSIBX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.6% |
| 1 year | 4.0% |
| 3 years (annualised) | 5.1% |
| 5 years (annualised) | 0.9% |
CSIBX Risk Information
Risk metrics for CSIBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.1%
CSIBX Costs and Fees
CSIBX costs about $73 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.73%
- Gross expense ratio: 0.75%
- Portfolio turnover: 326%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
CSIBX Cashflows
Over the 12 months to 2026-06, Calvert Bond Fund had net inflows of $360.85M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $301.59K |
| 2026-05 | −$77.36M |
| 2026-04 | $19.26M |
| 2026-03 | $53.04M |
| 2026-02 | $39.50M |
| 2026-01 | $32.94M |
CSIBX Debt Constituents
Largest debt holdings of Calvert Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 6.77% |
| United States Treasury | 5.07% |
| United States Treasury | 2.37% |
| United States Treasury | 2.02% |
| United States Treasury | 1.51% |
| Nykredit Realkredit A/s | 1.26% |
| United States Treasury | 1.18% |
| European Investment Bank | 1.04% |
| United States Treasury | 0.68% |
| Intl Bk Recon & Develop | 0.67% |
CSIBX Prospectus and SEC Filings
Official Calvert Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-27
- Prospectus (485BPOS) — filed 2025-01-24
- Prospectus (485BPOS) — filed 2024-01-25
- Portfolio holdings (N-PORT) — filed 2026-08-27
- Portfolio holdings (N-PORT) — filed 2026-05-26
- Portfolio holdings (N-PORT) — filed 2026-02-27
- Annual census (N-CEN) — filed 2025-12-12
- Annual census (N-CEN) — filed 2024-12-05
Related Funds
Other Long Total / Aggregate 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.