| NAESX | VSPRX | NAESX / VSPRX | |
| Total Expense Ratio | 0.17 | 0.80 | 21% |
| Annual Report Gross Expense Ratio | 0.17 | 0.80 | 21% |
| Fund Existence | 66 years | 11 years | - |
| Gain YTD | 15.738 | 10.338 | 152% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 189B | 215M | 87,907% |
| Annual Yield % from dividends | 1.07 | 0.69 | 155% |
| Returns for 1 year | 22.10 | 18.21 | 121% |
| Returns for 3 years | 48.79 | 18.96 | 257% |
| Returns for 5 years | 34.72 | -20.47 | -170% |
| Returns for 10 years | 157.23 | -12.37 | -1,271% |