| NTBAX | NTBIX | NTBAX / NTBIX | |
| Total Expense Ratio | 1.32 | 1.07 | 123% |
| Annual Report Gross Expense Ratio | 1.34 | 1.09 | 123% |
| Fund Existence | 12 years | 12 years | - |
| Gain YTD | 1.449 | 1.745 | 83% |
| Front Load | 4% | N/A | - |
| Min. Initial Investment | 5000 | 25000 | 20% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 7.46B | 7.46B | 100% |
| Annual Yield % from dividends | 5.41 | 5.66 | 96% |
| Returns for 1 year | 1.51 | 1.87 | 81% |
| Returns for 3 years | 20.42 | 21.33 | 96% |
| Returns for 5 years | 6.50 | 7.87 | 82% |
| Returns for 10 years | 42.65 | 46.27 | 92% |