BMSBX Fees and Costs — MFS Blended Research Mid Cap Equity Fund, Class B
Data updated: 2026-09-25
The net expense ratio is 1.59%: a 0.49% management fee, a 1.00% 12b-1 fee plus 0.14% other expenses, less a 0.04% fee waiver. This share class carries a deferred sales charge of up to 4.00%. In fiscal 2026 the fund paid $428K in broker commissions, 0.0192% of average net assets, and portfolio turnover was 51%.
BMSBX Fees and Expenses
Annual operating expenses and sales charges of BMSBX. Prospectus, as of May 31, 2026.
| Annual operating expenses | |
|---|---|
| Management fee | 0.49% |
| 12b-1 fee | 1.00% |
| Other expenses | 0.14% |
| Gross expense ratio | 1.63% |
| Fee waiver | −0.04% |
| Net expense ratio | 1.59% |
| Sales charges | |
|---|---|
| Max front load | 0.00% |
| Max deferred load | 4.00% |
| Redemption fee | — |
| Expense limitation in place (N-CEN) | Yes |
| Fees waived or reduced during the year | Yes |
| Waived fees subject to recoupment | No |
BMSBX Costs Over Time
On $10,000 invested in BMSBX, assuming 5% a year before costs, total costs come to $994 over 5 years, cutting the return by 1.69% 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 |
| Sales charges | $413 | $0 | $0 |
| Fund expenses (net expense ratio 1.59%) | $167 | $518 | $892 |
| Trading costs (broker commissions) | $2 | $6 | $11 |
| Lost growth on money paid in costs | $0 | $26 | $92 |
| Total costs | $582 | $550 | $994 |
| Value after costs | $9,918 | $11,026 | $11,768 |
| Impact on return, per year | 5.82% | 1.69% | 1.69% |
BMSBX Trading Costs
Brokerage costs reported on SEC Form N-CEN for the fiscal year ending May 31, 2026.
- Explicit cost rate (commissions ÷ average net assets): 0.0192%
- Total broker commissions: $428K
- Bought from dealers (principal trades, not a cost): $13.0M
- Portfolio turnover (prospectus): 51%
- Securities on loan, average value: $1.5M
- Net income from securities lending: $12K (0.001% of average net assets)
BMSBX Agency Brokers
Commissions paid.
| Broker | Amount | Share |
|---|---|---|
| Jefferies LLC | $237K | 55.46% |
| J.P. Morgan Securities LLC | $82K | 19.25% |
| National Financial Services LLC | $76K | 17.68% |
| Morgan Stanley & Co. LLC | $9K | 2.22% |
| Virtu Americas LLC | $9K | 2.02% |
| BMO Capital Markets Corp. | $6K | 1.32% |
| UBS Securities LLC | $5K | 1.18% |
| Goldman Sachs & Co. LLC | $3K | 0.79% |
| Citadel Securities LLC | $204 | 0.05% |
| BofA Securities, Inc. | $183 | 0.04% |
BMSBX Dealer Counterparties
Securities bought directly from dealers (principal trades).
| Broker | Amount | Share |
|---|---|---|
| Goldman Sachs & Co. LLC | $8.1M | 62.41% |
| State Street Global Markets, LLC | $3.1M | 23.68% |
| Brown Brothers Investments, LLC | $1.3M | 10.19% |
| Morgan Stanley & Co. LLC | $474K | 3.66% |
| J.P. Morgan Securities LLC | $8K | 0.06% |
MFS Blended Research Mid Cap Equity Fund Share Classes
Net expense ratio and maximum front-end load of each share class, cheapest first.
| Ticker | Class | Net expense ratio | Front load |
|---|---|---|---|
| BMSYX | Class R6 | 0.51% | none |
| BMSLX | Class I | 0.59% | none |
| BMSVX | Class R4 | 0.59% | none |
| BMSFX | Class A | 0.84% | 5.75% |
| BMSTX | Class R3 | 0.84% | none |
| BMSSX | Class R2 | 1.09% | none |
| BMSBX | Class B | 1.59% | none |
| BMSDX | Class C | 1.59% | none |
| BMSRX | Class R1 | 1.59% | 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.