MRBKX Fees and Costs — MFS Total Return Bond Fund, Class R6
Data updated: 2026-09-28
The net expense ratio is 0.36%: a 0.39% management fee plus 0.03% other expenses, less a 0.06% fee waiver. There are no sales loads or redemption fees. In fiscal 2026 the fund paid $225K in broker commissions, 0.0027% of average net assets, and portfolio turnover was 48%.
MRBKX Fees and Expenses
Annual operating expenses and sales charges of MRBKX. Prospectus, as of April 30, 2026.
| Annual operating expenses | |
|---|---|
| Management fee | 0.39% |
| 12b-1 fee | 0.00% |
| Other expenses | 0.03% |
| Gross expense ratio | 0.42% |
| Fee waiver | −0.06% |
| Net expense ratio | 0.36% |
| 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 |
MRBKX Costs Over Time
On $10,000 invested in MRBKX, assuming 5% a year before costs, total costs come to $230 over 5 years, cutting the return by 0.38% 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 0.36%) | $38 | $119 | $207 |
| Trading costs (broker commissions) | $0 | $1 | $2 |
| Lost growth on money paid in costs | $0 | $6 | $21 |
| Total costs | $38 | $126 | $230 |
| Value after costs | $10,462 | $11,451 | $12,533 |
| Impact on return, per year | 0.38% | 0.38% | 0.38% |
MRBKX Trading Costs
Brokerage costs reported on SEC Form N-CEN for the fiscal year ending April 30, 2026.
- Explicit cost rate (commissions ÷ average net assets): 0.0027%
- Total broker commissions: $225K
- Bought from dealers (principal trades, not a cost): $7.5B
- Portfolio turnover (prospectus): 48%
- Securities lending: none during the year
MRBKX Agency Brokers
Commissions paid.
| Broker | Amount | Share |
|---|---|---|
| Merrill Lynch, Pierce, Fenner & Smith Inc. | $225K | 100.00% |
MRBKX Dealer Counterparties
Securities bought directly from dealers (principal trades).
| Broker | Amount | Share |
|---|---|---|
| Mizuho Securities USA LLC | $1.4B | 20.71% |
| BofA Securities, Inc. | $1.3B | 19.32% |
| Wells Fargo Securities, LLC | $947.8M | 14.48% |
| Citigroup Global Markets Inc. | $860.9M | 13.15% |
| J.P. Morgan Securities LLC | $806.3M | 12.32% |
| Morgan Stanley & Co. LLC | $701.5M | 10.72% |
| Bank of Montreal | $187.4M | 2.86% |
| BNP Paribas Securities Corp. | $142.2M | 2.17% |
| Deutsche Bank Securities Inc. | $140.7M | 2.15% |
| Barclays Capital, Inc. | $138.9M | 2.12% |
MFS Total Return 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 |
|---|---|---|---|
| MRBKX | Class R6 | 0.36% | none |
| MRBIX | Class I | 0.45% | none |
| MRBJX | Class R4 | 0.45% | none |
| MRBFX | Class A | 0.60% | 4.25% |
| MRBHX | Class R3 | 0.70% | none |
| MRRRX | Class R2 | 0.95% | none |
| MRBBX | Class B | 1.35% | none |
| MRBCX | Class C | 1.45% | none |
| MRBGX | Class R1 | 1.45% | 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.