| 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 | 7.189 | 1.312 | 548% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 2.08B | 32B | 6% |
| Annual Yield % from dividends | 0.00 | 0.01 | - |
| Returns for 1 year | -5.83 | -6.63 | 88% |
| Returns for 3 years | 27.47 | 34.99 | 79% |
| Returns for 5 years | -10.62 | 29.47 | -36% |
| Returns for 10 years | 33.01 | 101.34 | 33% |