| IVIYX | NPFFX | IVIYX / NPFFX | |
| Total Expense Ratio | 1.10 | 0.77 | 143% |
| Annual Report Gross Expense Ratio | 1.30 | 0.77 | 169% |
| Fund Existence | 23 years | 26 years | - |
| Gain YTD | 8.749 | 6.544 | 134% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 250 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 864M | 169B | 1% |
| Annual Yield % from dividends | 0.00 | 0.92 | - |
| Returns for 1 year | 1.26 | 3.93 | 32% |
| Returns for 3 years | 35.08 | 39.74 | 88% |
| Returns for 5 years | -32.06 | 10.57 | -303% |
| Returns for 10 years | 6.61 | 110.13 | 6% |