MDBLX — MassMutual Diversified Bond Fund
Data updated: 2026-08-27
MDBLX — MassMutual Diversified Bond Fund. Long Total / Aggregate Bond · $71.09M AUM · 0.89% expense ratio. Holdings, fees, performance and SEC filings.
MDBLX Fund Overview
MDBLX — MassMutual Diversified Bond Fund is a US mutual fund managed by Massmutual Premier Funds, 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: Massmutual Premier Funds
- Category: Long Total / Aggregate Bond
- Assets under management: $71.09M
- 1-year return: 6.9%
- Ticker: MDBLX
- SEC CIK: 0000927972
- SEC series ID: S000003793
- Share class ID: C000010554
MDBLX Holdings
Top 10 holdings of MassMutual Diversified Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| State Street Global Advisors | 2.40% |
| New Residential Mortgage Loan Trust | 1.83% |
| Fidus Re Ltd. | 1.26% |
| OneMain Direct Auto Receivables Trust | 1.04% |
| Perrigo Finance Unlimite | 0.95% |
| Ncl Corporation Ltd. | 0.93% |
| Uniti Group/csl Capital | 0.88% |
| Hilcorp Energy I/hilcorp | 0.82% |
| Ellington Financial Mortgage Trust | 0.81% |
| Ellington Financial Mortgage Trust | 0.79% |
MDBLX Portfolio Allocation
Asset-class allocation of MassMutual Diversified Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 66.9% |
| Securitized | 32.1% |
| Cash & Equivalents | 2.6% |
| Equity | 0.3% |
| Derivatives | 0.1% |
MDBLX Performance
Total returns for MDBLX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 3.0% |
| 1 year | 6.9% |
| 3 years (annualised) | 6.9% |
| 5 years (annualised) | 0.7% |
MDBLX Risk Information
Risk metrics for MDBLX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.7%
MDBLX Costs and Fees
MDBLX costs about $89 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.89%
- Gross expense ratio: 1.02%
- Portfolio turnover: 265%
- Brokerage commissions: 0.54 bps of average net assets (SEC N-CEN)
MDBLX Cashflows
Over the 12 months to 2026-06, MassMutual Diversified Bond Fund had net outflows of $1.58M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $574.82K |
| 2026-05 | $506.43K |
| 2026-04 | $232.93K |
| 2026-03 | −$1.34M |
| 2026-02 | $88.12K |
| 2026-01 | $511.07K |
MDBLX Debt Constituents
Largest debt holdings of MassMutual Diversified Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Fidus Re Ltd. | 1.26% |
| Perrigo Finance Unlimite | 0.95% |
| Ncl Corporation Ltd. | 0.93% |
| Uniti Group/csl Capital | 0.88% |
| Hilcorp Energy I/hilcorp | 0.82% |
| Service Properties Trust | 0.78% |
| American National Group | 0.73% |
| Ggam Finance Ltd. | 0.72% |
| United States Treasury | 0.70% |
| Brightstar Lot/brighstar | 0.67% |
MDBLX Prospectus and SEC Filings
Official MassMutual Diversified Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-30
- Prospectus (485BPOS) — filed 2025-01-31
- Prospectus supplement (497) — filed 2024-07-01
- Portfolio holdings (N-PORT) — filed 2026-08-27
- Portfolio holdings (N-PORT) — filed 2026-05-27
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2025-12-12
- Annual census (N-CEN) — filed 2024-12-13
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.