| NBMIX | VISGX | NBMIX / VISGX | |
| Total Expense Ratio | 1.31 | 0.19 | 689% |
| Annual Report Gross Expense Ratio | 1.31 | 0.19 | 689% |
| Fund Existence | 28 years | 28 years | - |
| Gain YTD | 6.984 | 15.802 | 44% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 641M | 44.7B | 1% |
| Annual Yield % from dividends | 0.00 | 0.32 | - |
| Returns for 1 year | 7.40 | 18.96 | 39% |
| Returns for 3 years | 43.67 | 53.94 | 81% |
| Returns for 5 years | -4.73 | 18.28 | -26% |
| Returns for 10 years | 100.00 | 166.92 | 60% |