| 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 | 1.658 | 1.955 | 85% |
| Front Load | 4% | N/A | - |
| Min. Initial Investment | 5000 | 25000 | 20% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 7.56B | 7.56B | 100% |
| Annual Yield % from dividends | 5.42 | 5.68 | 95% |
| Returns for 1 year | 2.33 | 2.59 | 90% |
| Returns for 3 years | 21.96 | 22.88 | 96% |
| Returns for 5 years | 8.29 | 9.69 | 86% |
| Returns for 10 years | 41.15 | 44.88 | 92% |