| NTBAX | NTBIX | NTBAX / NTBIX | |
| Total Expense Ratio | 1.28 | 1.03 | 124% |
| Annual Report Gross Expense Ratio | 1.30 | 1.05 | 124% |
| Fund Existence | 12 years | 12 years | - |
| Gain YTD | 1.312 | 1.481 | 89% |
| Front Load | 4% | N/A | - |
| Min. Initial Investment | 5000 | 25000 | 20% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 7.22B | 7.22B | 100% |
| Annual Yield % from dividends | 4.29 | 4.54 | 94% |
| Returns for 1 year | 5.61 | 5.88 | 95% |
| Returns for 3 years | 17.66 | 18.55 | 95% |
| Returns for 5 years | 8.46 | 9.80 | 86% |
| Returns for 10 years | 34.88 | 38.33 | 91% |