| PRBLX | VFFSX | PRBLX / VFFSX | |
| Total Expense Ratio | 0.81 | 0.01 | 8,100% |
| Annual Report Gross Expense Ratio | 0.85 | 0.01 | 8,500% |
| Fund Existence | 34 years | 10 years | - |
| Gain YTD | 6.995 | 9.846 | 71% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 2000 | 5000000000 | 0% |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 24B | 1.7T | 1% |
| Annual Yield % from dividends | 0.03 | 1.04 | 3% |
| Returns for 1 year | -2.78 | 25.72 | -11% |
| Returns for 3 years | 13.50 | 72.68 | 19% |
| Returns for 5 years | 0.09 | 77.08 | 0% |
| Returns for 10 years | 71.24 | 270.25 | 26% |