| 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 | 1.350 | 10.685 | 13% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000000 | 5000000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 6.36B | 1.67T | 0% |
| Annual Yield % from dividends | 1.07 | 1.08 | 99% |
| Returns for 1 year | -1.94 | 21.07 | -9% |
| Returns for 3 years | 20.88 | 68.45 | 30% |
| Returns for 5 years | 25.32 | 73.48 | 34% |
| Returns for 10 years | 97.10 | 251.21 | 39% |