| NBMLX | PMBMX | NBMLX / PMBMX | |
| Total Expense Ratio | 0.69 | 1.14 | 61% |
| Annual Report Gross Expense Ratio | 0.69 | 1.14 | 61% |
| Fund Existence | 19 years | 25 years | - |
| Gain YTD | 8.605 | 1.469 | 586% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000000 | 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 | -7.20 | -8.38 | 86% |
| Returns for 3 years | 26.72 | 30.25 | 88% |
| Returns for 5 years | -11.38 | 23.98 | -47% |
| Returns for 10 years | 31.19 | 87.43 | 36% |