| NTIAX | VIEIX | NTIAX / VIEIX | |
| Total Expense Ratio | 0.45 | 0.05 | 900% |
| Annual Report Gross Expense Ratio | 0.58 | 0.05 | 1,160% |
| Fund Existence | 26 years | 29 years | - |
| Gain YTD | 5.094 | 2.837 | 180% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 2000 | 5000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 2.54B | 82.1B | 3% |
| Annual Yield % from dividends | 0.98 | 1.11 | 88% |
| Returns for 1 year | 1.45 | 9.31 | 16% |
| Returns for 3 years | 4.74 | 43.71 | 11% |
| Returns for 5 years | -8.85 | 21.42 | -41% |
| Returns for 10 years | 27.98 | 204.36 | 14% |