| NBMBX | PMBPX | NBMBX / PMBPX | |
| Total Expense Ratio | 1.20 | 0.83 | 145% |
| Annual Report Gross Expense Ratio | 1.20 | 0.83 | 145% |
| Fund Existence | 29 years | 25 years | - |
| Gain YTD | 10.706 | -2.922 | -366% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 2.07B | 30.9B | 7% |
| Annual Yield % from dividends | 0.00 | 0.01 | - |
| Returns for 1 year | -5.56 | -10.82 | 51% |
| Returns for 3 years | 31.28 | 29.35 | 107% |
| Returns for 5 years | -12.91 | 22.09 | -58% |
| Returns for 10 years | 39.84 | 96.41 | 41% |