CUBAX Performance — Calvert Flexible Bond Fund, Class A
Data updated: 2026-08-24
CUBAX returned +0.90% year to date and +4.44% over one year to Jun 2026. Annualised returns are +6.71% over 3 years and +3.88% over 5 years. The fund beat its Intermediate Core Bond category average: $100 invested three years ago grew to $121, against $115 for the category, and to $104 over one year, against $104. Volatility over the past three years was 3.07% a year. In the 12 months to Jun 2026 the fund took in a net $218.6M, and assets reached $866.86M.
CUBAX Growth of $100
What $100 invested in Calvert Flexible Bond 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 | CUBAX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $104 | $104 |
| 3 years (Jul 2023 – Jun 2026) | $121 | $115 |
| 5 years (Jul 2021 – Jun 2026) | $121 | $102 |
| Since data start (Jul 2019 – Jun 2026) | $132 | $112 |
CUBAX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.90% |
| 1 year | +4.44% |
| 3 years (annualised) | +6.71% |
| 5 years (annualised) | +3.88% |
CUBAX Annual Returns
Calendar-year total returns of Calvert Flexible Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +0.90% |
| 2025 | +7.95% |
| 2024 | +6.26% |
| 2023 | +8.43% |
| 2022 | −3.88% |
| 2021 | +3.61% |
| 2020 | +3.87% |
| 2019 (Jul–Dec) | +2.00% |
CUBAX 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 | +0.6% | +0.5% | −1.3% | +0.6% | +0.4% | 0.0% | — | — | — | — | — | — |
| 2025 | +0.9% | +1.3% | −0.2% | +0.4% | +0.5% | +1.3% | +0.3% | +1.1% | +0.7% | +0.3% | +0.7% | +0.4% |
| 2024 | +0.8% | −0.2% | +1.0% | −0.8% | +1.2% | +0.6% | +1.7% | +1.3% | +1.1% | −1.2% | +1.0% | −0.4% |
| 2023 | +2.6% | −0.5% | +0.4% | +0.1% | −0.1% | +0.8% | +0.7% | +0.2% | −0.6% | −0.6% | +2.9% | +2.4% |
| 2022 | −0.8% | −0.9% | −0.9% | −0.9% | −0.1% | −2.1% | +1.8% | −0.4% | −1.8% | +0.1% | +1.8% | +0.4% |
| 2021 | +1.0% | +0.7% | +0.6% | +0.4% | +0.4% | +0.3% | +0.2% | +0.1% | +0.3% | −0.2% | −0.5% | +0.4% |
| 2020 | +0.6% | −0.3% | −9.6% | +2.6% | +1.8% | +2.0% | +1.2% | +1.2% | +0.3% | +0.8% | +2.6% | +1.2% |
| 2019 | — | — | — | — | — | — | +0.3% | +0.2% | +0.2% | +0.4% | +0.3% | +0.5% |
CUBAX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 3.07%
- 3-year Sharpe ratio: 0.72 (vs 4.5% risk-free rate)
- Best month: +2.92% (Nov 2023)
- Worst month: −1.28% (Mar 2026)
CUBAX Fund Flows
Monthly money in and out of Calvert Flexible Bond Fund, from SEC Form N-PORT.
- 12-month net flow: $218.6M
- 12-month gross sales (incl. reinvestments): $399.4M
- Sales ÷ redemptions: 2.21×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $36.1M | $16.3M | $19.8M |
| May 2026 | $24.1M | $24.7M | −$666K |
| Apr 2026 | $24.8M | $18.6M | $6.1M |
| Mar 2026 | $48.6M | $15.3M | $33.4M |
| Feb 2026 | $31.5M | $11.4M | $20.1M |
| Jan 2026 | $29.3M | $10.0M | $19.3M |
| Dec 2025 | $34.5M | $18.0M | $16.5M |
| Nov 2025 | $21.0M | $27.4M | −$6.4M |
| Oct 2025 | $69.6M | $16.0M | $53.5M |
| Sep 2025 | $26.8M | $7.1M | $19.7M |
| Aug 2025 | $31.9M | $8.0M | $24.0M |
| Jul 2025 | $21.2M | $8.0M | $13.2M |
CUBAX Assets Under Management
Net assets of Calvert Flexible Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $866.86M |
| 2026-03-31 | $841.78M |
| 2025-12-31 | $779.90M |
| 2025-09-30 | $715.18M |
| 2025-06-30 | $651.64M |
| 2025-03-31 | $632.13M |
| 2024-12-31 | $582.69M |
| 2024-09-30 | $509.90M |
| 2024-06-30 | $399.30M |
| 2024-03-31 | $371.02M |
| 2023-12-31 | $342.99M |
| 2023-09-30 | $322.41M |
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.