MMOBX Performance — MassMutual Diversified Bond Fund, Class Y
Data updated: 2026-08-27
MMOBX returned +3.25% year to date and +7.16% over one year to Jun 2026. The annualised 3-year return is +7.14%. The fund beat its Short-Term Core Bond category average: $100 invested three years ago grew to $123, against $118 for the category, and to $107 over one year, against $104. Volatility over the past three years was 5.46% a year. In the 12 months to Jun 2026 the fund lost a net $1.6M, and assets reached $71.09M.
MMOBX Growth of $100
What $100 invested in MassMutual Diversified Bond Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Core Bond category average over the same months.
| Period | MMOBX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $107 | $104 |
| 3 years (Jul 2023 – Jun 2026) | $123 | $118 |
| Since data start (Jan 2023 – Jun 2026) | $119 | $121 |
MMOBX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +3.25% |
| 1 year | +7.16% |
| 3 years (annualised) | +7.14% |
MMOBX Annual Returns
Calendar-year total returns of MassMutual Diversified Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +3.25% |
| 2025 | +8.78% |
| 2024 | +4.58% |
| 2023 | +1.43% |
MMOBX 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 | +0.7% | +1.1% | −1.4% | +1.5% | +0.9% | +0.5% | — | — | — | — | — | — |
| 2025 | −0.4% | +2.5% | +0.5% | 0.0% | +0.2% | +1.9% | +0.1% | +1.2% | +1.5% | +0.6% | +0.3% | 0.0% |
| 2024 | +1.2% | −1.0% | +0.3% | +1.0% | +1.9% | −2.2% | +1.6% | +1.5% | +2.2% | −1.4% | +1.5% | −2.1% |
| 2023 | +0.6% | −2.9% | 0.0% | −0.1% | −1.1% | +0.4% | −2.1% | −0.5% | +0.5% | +4.2% | +4.7% | −1.9% |
MMOBX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 5.46%
- 3-year Sharpe ratio: 0.48 (vs 4.5% risk-free rate)
- Best month: +4.66% (Nov 2023)
- Worst month: −2.22% (Jun 2024)
MMOBX Fund Flows
Monthly money in and out of MassMutual Diversified Bond Fund, from SEC Form N-PORT.
- 12-month net flow: −$1.6M
- 12-month gross sales (incl. reinvestments): $17.5M
- Sales ÷ redemptions: 0.92×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $1.4M | $820K | $575K |
| May 2026 | $1.1M | $608K | $506K |
| Apr 2026 | $997K | $764K | $233K |
| Mar 2026 | $863K | $2.2M | −$1.3M |
| Feb 2026 | $1.3M | $1.2M | $88K |
| Jan 2026 | $1.3M | $816K | $511K |
| Dec 2025 | $1.1M | $1.4M | −$289K |
| Nov 2025 | $1.4M | $562K | $863K |
| Oct 2025 | $1.7M | $1.7M | −$79K |
| Sep 2025 | $1.2M | $697K | $453K |
| Aug 2025 | $2.3M | $2.7M | −$454K |
| Jul 2025 | $3.0M | $5.6M | −$2.7M |
MMOBX Assets Under Management
Net assets of MassMutual Diversified Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $71.09M |
| 2026-03-31 | $68.75M |
| 2025-12-31 | $70.00M |
| 2025-09-30 | $69.53M |
| 2025-06-30 | $71.04M |
| 2025-03-31 | $74.02M |
| 2024-12-31 | $122.22M |
| 2024-09-30 | $134.71M |
| 2024-06-30 | $125.92M |
| 2024-03-31 | $137.38M |
| 2023-12-31 | $137.88M |
| 2023-09-30 | $156.98M |
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.