| NSBFX | VFFSX | NSBFX / VFFSX | |
| Total Expense Ratio | 0.61 | 0.01 | 6,100% |
| Annual Report Gross Expense Ratio | 0.61 | 0.01 | 6,100% |
| Fund Existence | 13 years | 10 years | - |
| Gain YTD | 1.286 | 11.121 | 12% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000000 | 5000000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 6.18B | 1.76T | 0% |
| Annual Yield % from dividends | 1.04 | 1.05 | 98% |
| Returns for 1 year | -5.72 | 15.26 | -37% |
| Returns for 3 years | 21.72 | 70.33 | 31% |
| Returns for 5 years | 24.52 | 70.49 | 35% |
| Returns for 10 years | 102.08 | 258.63 | 39% |