| NBFAX | NPFFX | NBFAX / NPFFX | |
| Total Expense Ratio | 1.33 | 0.77 | 173% |
| Annual Report Gross Expense Ratio | 1.33 | 0.77 | 173% |
| Fund Existence | 30 years | 25 years | - |
| Gain YTD | 6.822 | 6.572 | 104% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 250 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 818M | 166B | 0% |
| Annual Yield % from dividends | 0.07 | 0.92 | 8% |
| Returns for 1 year | 2.03 | 7.26 | 28% |
| Returns for 3 years | 51.69 | 38.48 | 134% |
| Returns for 5 years | -2.01 | 9.51 | -21% |
| Returns for 10 years | -22.51 | 106.06 | -21% |