MDBYX Fees and Costs — MassMutual Diversified Bond Fund, Service Class
Data updated: 2026-08-27
The net expense ratio is 0.79%: a 0.40% management fee plus 0.52% other expenses, less a 0.13% fee waiver. There are no sales loads or redemption fees. In fiscal 2025 the fund paid $5K in broker commissions, 0.0054% of average net assets, and portfolio turnover was 265%.
MDBYX Fees and Expenses
Annual operating expenses and sales charges of MDBYX. Prospectus, as of September 30, 2025.
| Annual operating expenses | |
|---|---|
| Management fee | 0.40% |
| 12b-1 fee | 0.00% |
| Other expenses | 0.52% |
| Gross expense ratio | 0.92% |
| Fee waiver | −0.13% |
| Net expense ratio | 0.79% |
| Sales charges | |
|---|---|
| Max front load | 0.00% |
| Max deferred load | 0.00% |
| Redemption fee | — |
| Expense limitation in place (N-CEN) | Yes |
| Fees waived or reduced during the year | Yes |
| Waived fees subject to recoupment | No |
MDBYX Costs Over Time
On $10,000 invested in MDBYX, assuming 5% a year before costs, total costs come to $500 over 5 years, cutting the return by 0.84% a year. Illustration, not a forecast: it assumes today's net expense ratio throughout (a fee waiver may end).
| $10,000 invested | Sell after 1 year | Sell after 3 years | Sell after 5 years |
|---|---|---|---|
| Value before costs | $10,500 | $11,576 | $12,763 |
| Fund expenses (net expense ratio 0.79%) | $83 | $259 | $451 |
| Trading costs (broker commissions) | $1 | $2 | $3 |
| Lost growth on money paid in costs | $0 | $13 | $46 |
| Total costs | $84 | $274 | $500 |
| Value after costs | $10,416 | $11,302 | $12,263 |
| Impact on return, per year | 0.84% | 0.84% | 0.84% |
MDBYX Trading Costs
Brokerage costs reported on SEC Form N-CEN for the fiscal year ending September 30, 2025.
- Explicit cost rate (commissions ÷ average net assets): 0.0054%
- Total broker commissions: $5K
- Bought from dealers (principal trades, not a cost): $1.2B
- Portfolio turnover (prospectus): 265%
- Securities on loan, average value: $4.4M
- Net income from securities lending: $14K (0.014% of average net assets)
MDBYX Agency Brokers
Commissions paid.
| Broker | Amount | Share |
|---|---|---|
| Goldman Sachs & Co. LLC | $5K | 100.00% |
MDBYX Dealer Counterparties
Securities bought directly from dealers (principal trades).
| Broker | Amount | Share |
|---|---|---|
| State Street Bank and Trust Company | $466.8M | 46.66% |
| Wells Fargo Securities, LLC | $111.9M | 11.19% |
| Barclays Capital Inc. | $82.8M | 8.28% |
| Goldman Sachs & Co. LLC | $77.0M | 7.70% |
| Mizuho Securities USA LLC | $70.1M | 7.00% |
| BofA Securities, Inc. | $46.2M | 4.62% |
| BNP Paribas Securities Corp. | $43.1M | 4.31% |
| BNY Capital Markets, LLC | $40.3M | 4.03% |
| RBC Capital Markets, LLC | $32.2M | 3.21% |
| BMO Capital Markets Corp. | $30.1M | 3.01% |
MassMutual Diversified Bond Fund Share Classes
Net expense ratio and maximum front-end load of each share class, cheapest first.
| Ticker | Class | Net expense ratio | Front load |
|---|---|---|---|
| MMOKX | C000271056 | 0.32% | none |
| MMEFX | C000271055 | 0.54% | none |
| MDBZX | Class I | 0.59% | none |
| MDBSX | Class R5 | 0.69% | none |
| MMOBX | Class Y | 0.69% | none |
| MDBYX | Service Class | 0.79% | none |
| MDBLX | Administrative Class | 0.89% | none |
| MDBFX | Class R4 | 1.04% | none |
| MDVAX | Class A | 1.09% | 4.25% |
| MDBRX | Class R3 | 1.29% | none |
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.