| 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 | 25 years | 28 years | - |
| Gain YTD | -0.636 | 5.640 | -11% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 2000 | 5000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 2.4B | 83.9B | 3% |
| Annual Yield % from dividends | 1.03 | 1.09 | 94% |
| Returns for 1 year | -9.18 | 3.50 | -262% |
| Returns for 3 years | 3.33 | 45.20 | 7% |
| Returns for 5 years | -5.89 | 36.33 | -16% |
| Returns for 10 years | 0.89 | 139.96 | 1% |