| IVIYX | NPFFX | IVIYX / NPFFX | |
| Total Expense Ratio | 1.10 | 0.77 | 143% |
| Annual Report Gross Expense Ratio | 1.31 | 0.77 | 170% |
| Fund Existence | 23 years | 25 years | - |
| Gain YTD | 9.865 | 5.301 | 186% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 250 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 898M | 170B | 1% |
| Annual Yield % from dividends | 0.00 | 0.92 | - |
| Returns for 1 year | 5.46 | 7.39 | 74% |
| Returns for 3 years | 34.96 | 34.25 | 102% |
| Returns for 5 years | -30.64 | 13.14 | -233% |
| Returns for 10 years | 8.82 | 108.19 | 8% |