| NAESX | PSPIX | NAESX / PSPIX | |
| Total Expense Ratio | 0.17 | 0.16 | 106% |
| Annual Report Gross Expense Ratio | 0.17 | 0.16 | 106% |
| Fund Existence | 65 years | 9 years | - |
| Gain YTD | 2.409 | 0.156 | 1,548% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 3000 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 162B | 1.18B | 13,706% |
| Annual Yield % from dividends | 1.22 | 1.21 | 101% |
| Returns for 1 year | -0.86 | -10.60 | 8% |
| Returns for 3 years | 29.99 | -2.89 | -1,037% |
| Returns for 5 years | 39.31 | 7.98 | 493% |
| Returns for 10 years | 122.07 | N/A | - |