| NBMBX | PMBMX | NBMBX / PMBMX | |
| Total Expense Ratio | 1.20 | 1.14 | 105% |
| Annual Report Gross Expense Ratio | 1.20 | 1.14 | 105% |
| Fund Existence | 29 years | 25 years | - |
| Gain YTD | 8.069 | 1.469 | 549% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 2.03B | 31.6B | 6% |
| Annual Yield % from dividends | 0.00 | 0.02 | - |
| Returns for 1 year | -7.86 | -8.38 | 94% |
| Returns for 3 years | 24.46 | 30.25 | 81% |
| Returns for 5 years | -14.04 | 23.98 | -59% |
| Returns for 10 years | 30.89 | 87.43 | 35% |