| NBFAX | NPFFX | NBFAX / NPFFX | |
| Total Expense Ratio | 1.35 | 0.78 | 173% |
| Annual Report Gross Expense Ratio | 1.35 | 0.78 | 173% |
| Fund Existence | 29 years | 25 years | - |
| Gain YTD | 22.144 | 21.169 | 105% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 250 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 833M | 165B | 1% |
| Annual Yield % from dividends | 0.00 | 0.43 | - |
| Returns for 1 year | 19.71 | 14.58 | 135% |
| Returns for 3 years | 77.40 | 50.75 | 153% |
| Returns for 5 years | 22.94 | 33.79 | 68% |
| Returns for 10 years | -26.81 | 101.06 | -27% |