| NRGSX | NSRSX | NRGSX / NSRSX | |
| Total Expense Ratio | 0.74 | 0.81 | 91% |
| Annual Report Gross Expense Ratio | 0.74 | 1.01 | 73% |
| Fund Existence | 13 years | 8 years | - |
| Gain YTD | 9.900 | 23.876 | 41% |
| Front Load | N/A | N/A | - |
| Min. Initial Investment | 0 | 0 | - |
| Min. Initial Investment IRA | N/A | N/A | - |
| Net Assets | 7.49B | 723M | 1,036% |
| Annual Yield % from dividends | 0.47 | 0.00 | - |
| Returns for 1 year | -3.03 | 35.37 | -9% |
| Returns for 3 years | 1.88 | 69.34 | 3% |
| Returns for 5 years | -20.50 | 15.31 | -134% |
| Returns for 10 years | 14.17 | N/A | - |