| 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 | 17.157 | 10.852 | 158% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000 | 3000 | 33% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 8.56B | 208B | 4% |
| Annual Yield % from dividends | 1.90 | 2.09 | 91% |
| Returns for 1 year | 11.98 | 5.48 | 219% |
| Returns for 3 years | 26.15 | 32.94 | 79% |
| Returns for 5 years | 73.51 | 64.69 | 114% |
| Returns for 10 years | 115.89 | 128.99 | 90% |