| NPRTX | VVIAX | NPRTX / VVIAX | |
| Total Expense Ratio | 0.76 | 0.05 | 1,520% |
| Annual Report Gross Expense Ratio | 0.76 | 0.05 | 1,520% |
| Fund Existence | 51 years | 25 years | - |
| Gain YTD | 20.945 | 14.171 | 148% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000 | 3000 | 33% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 8.73B | 216B | 4% |
| Annual Yield % from dividends | 1.85 | 2.04 | 91% |
| Returns for 1 year | 16.21 | 10.16 | 159% |
| Returns for 3 years | 30.08 | 34.53 | 87% |
| Returns for 5 years | 61.44 | 63.70 | 96% |
| Returns for 10 years | 137.35 | 139.89 | 98% |