| NBSRX | VFFSX | NBSRX / VFFSX | |
| Total Expense Ratio | 0.86 | 0.01 | 8,600% |
| Annual Report Gross Expense Ratio | 0.86 | 0.01 | 8,600% |
| Fund Existence | 32 years | 10 years | - |
| Gain YTD | 17.860 | 13.342 | 134% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 1000 | 5000000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 4.86B | 1.69T | 0% |
| Annual Yield % from dividends | 0.00 | 1.08 | - |
| Returns for 1 year | 28.99 | 21.68 | 134% |
| Returns for 3 years | 64.01 | 73.94 | 87% |
| Returns for 5 years | 34.73 | 74.03 | 47% |
| Returns for 10 years | 94.24 | 255.38 | 37% |