| NTIAX | VIEIX | NTIAX / VIEIX | |
| Total Expense Ratio | 0.45 | 0.04 | 1,125% |
| Annual Report Gross Expense Ratio | 0.59 | 0.04 | 1,475% |
| Fund Existence | 26 years | 29 years | - |
| Gain YTD | 11.788 | 17.629 | 67% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 2000 | 5000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 2.51B | 93.6B | 3% |
| Annual Yield % from dividends | 0.94 | 1.04 | 90% |
| Returns for 1 year | 11.20 | 23.90 | 47% |
| Returns for 3 years | 20.14 | 69.83 | 29% |
| Returns for 5 years | -7.23 | 36.15 | -20% |
| Returns for 10 years | 11.54 | 178.70 | 6% |