| 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 | 5.481 | 3.729 | 147% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 250 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 820M | 170B | 0% |
| Annual Yield % from dividends | 0.07 | 0.92 | 8% |
| Returns for 1 year | 1.01 | 3.65 | 28% |
| Returns for 3 years | 47.44 | 32.93 | 144% |
| Returns for 5 years | 0.81 | 10.43 | 8% |
| Returns for 10 years | -22.70 | 104.75 | -22% |