MBOIX Performance — Madison Core Bond Fund, Class I
Data updated: 2026-09-17
MBOIX returned −0.95% year to date and +2.45% over one year to Jul 2026. Annualised returns are +3.87% over 3 years and −0.22% over 5 years. The fund trailed its Intermediate Core Bond category average: $100 invested three years ago grew to $112, against $113 for the category, and to $102 over one year, against $103. Volatility over the past three years was 5.61% a year. In the 12 months to Jul 2026 the fund took in a net $21.8M, and assets reached $223.27M.
MBOIX Growth of $100
What $100 invested in Madison Core 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 | MBOIX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $102 | $103 |
| 3 years (Aug 2023 – Jul 2026) | $112 | $113 |
| 5 years (Aug 2021 – Jul 2026) | $99 | $100 |
| Since data start (Feb 2021 – Jul 2026) | $101 | $101 |
MBOIX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −0.95% |
| 1 year | +2.45% |
| 3 years (annualised) | +3.87% |
| 5 years (annualised) | −0.22% |
MBOIX Annual Returns
Calendar-year total returns of Madison Core Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | −0.95% |
| 2025 | +7.40% |
| 2024 | +1.52% |
| 2023 | +5.94% |
| 2022 | −12.55% |
| 2021 (Feb–Dec) | +0.77% |
MBOIX 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 | +0.3% | +1.5% | −1.8% | +0.1% | +0.2% | +0.5% | −1.7% | — | — | — | — | — |
| 2025 | +0.5% | +2.1% | −0.1% | +0.4% | −0.6% | +1.7% | −0.2% | +1.2% | +1.1% | +0.5% | +0.7% | −0.2% |
| 2024 | −0.2% | −1.3% | +1.0% | −2.5% | +1.6% | +1.2% | +1.8% | +1.7% | +1.2% | −2.4% | +1.2% | −1.6% |
| 2023 | +2.9% | −2.5% | +2.4% | +0.6% | −1.1% | −0.2% | +0.1% | −0.5% | −2.5% | −1.6% | +4.6% | +3.9% |
| 2022 | −2.1% | −1.2% | −2.5% | −3.6% | +0.3% | −1.6% | +2.4% | −2.7% | −4.0% | −1.2% | +3.2% | −0.2% |
| 2021 | — | 0.0% | −1.0% | +0.9% | +0.3% | +0.8% | +0.9% | −0.1% | −0.8% | −0.1% | +0.1% | −0.2% |
MBOIX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 5.61%
- 3-year Sharpe ratio: -0.11 (vs 4.5% risk-free rate)
- Best month: +4.61% (Nov 2023)
- Worst month: −2.48% (Sep 2023)
MBOIX Fund Flows
Monthly money in and out of Madison Core Bond Fund, from SEC Form N-PORT.
- 12-month net flow: $21.8M
- 12-month gross sales (incl. reinvestments): $52.8M
- Sales ÷ redemptions: 1.70×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $2.8M | $3.8M | −$931K |
| Jun 2026 | $2.7M | $1.2M | $1.4M |
| May 2026 | $3.4M | $1.5M | $1.9M |
| Apr 2026 | $1.7M | $2.1M | −$402K |
| Mar 2026 | $1.3M | $2.9M | −$1.6M |
| Feb 2026 | $15.2M | $9.7M | $5.5M |
| Jan 2026 | $1.8M | $2.0M | −$216K |
| Dec 2025 | $3.4M | $1.5M | $1.9M |
| Nov 2025 | $3.3M | $2.2M | $1.1M |
| Oct 2025 | $1.4M | $1.7M | −$231K |
| Sep 2025 | $4.6M | $1.3M | $3.3M |
| Aug 2025 | $11.3M | $1.3M | $9.9M |
MBOIX Assets Under Management
Net assets of Madison Core Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $223.27M |
| 2026-04-30 | $225.33M |
| 2026-01-31 | $224.48M |
| 2025-10-31 | $221.91M |
| 2025-07-31 | $204.98M |
| 2025-04-30 | $201.15M |
| 2025-01-31 | $199.96M |
| 2024-10-31 | $195.79M |
| 2024-07-31 | $185.74M |
| 2024-04-30 | $174.63M |
| 2024-01-31 | $195.73M |
| 2023-10-31 | $181.30M |
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.