| BRBCX | MBXIX | BRBCX / MBXIX | |
| Total Expense Ratio | 1.77 | 2.00 | 89% |
| Annual Report Gross Expense Ratio | 1.77 | 2.00 | 89% |
| Fund Existence | 33 years | 10 years | - |
| Gain YTD | 8.678 | 13.824 | 63% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000 | 2500 | 40% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 5.66B | 10.2B | 55% |
| Annual Yield % from dividends | 0.00 | 0.00 | - |
| Returns for 1 year | 10.86 | 19.43 | 56% |
| Returns for 3 years | 28.65 | 37.51 | 76% |
| Returns for 5 years | 30.06 | 33.99 | 88% |
| Returns for 10 years | 48.35 | 105.45 | 46% |