N-2 |
6 Months Ended |
|---|---|
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Sep. 30, 2025
$ / shares
| |
| Cover [Abstract] | |
| Entity Central Index Key | 0001976685 |
| Amendment Flag | false |
| Entity Inv Company Type | N-2 |
| Document Type | N-CSRS/A |
| Entity Registrant Name | Institutional Investment Strategy Fund |
| Founder Class Member | |
| General Description of Registrant [Abstract] | |
| NAV Per Share | $ 12.05 |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Outstanding Securities [Table Text Block] | 812,491.810 |
| Investor Class | |
| General Description of Registrant [Abstract] | |
| NAV Per Share | $ 12.04 |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Outstanding Securities [Table Text Block] | 3,575.726 |
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- Definition One of: N-1A (Mutual Fund), N-1 (Open-End Separate Account with No Variable Annuities), N-2 (Closed-End Investment Company), N-3 (Separate Account Registered as Open-End Management Investment Company), N-4 (Variable Annuity UIT Separate Account), N-5 (Small Business Investment Company), N-6 (Variable Life UIT Separate Account), S-1 or S-3 (Face Amount Certificate Company), S-6 (UIT, Non-Insurance Product). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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