How does an interval fund operate mechanically, and what investor protections are built into its structure?

An interval fund is a closed-end investment company that periodically offers to repurchase a stated percentage of its outstanding shares at net asset value. The mechanics are governed by SEC Rule 23c-3 under the Investment Company Act of 1940, providing a structured framework for managing liquidity in portfolios of illiquid assets.\n\nRepurchase Mechanics:\n\n1. Notification: The fund announces the upcoming repurchase offer at least 21 days before the repurchase request deadline. The announcement specifies the repurchase percentage (e.g., 5% of outstanding shares) and the deadline.\n\n2. Request window: Shareholders submit repurchase requests during a 14-42 day window.\n\n3. Pricing date: NAV is calculated on the repurchase pricing date (within 14 days after the request deadline).\n\n4. Payment: Shareholders receive cash within 7 days of the pricing date.\n\n5. Proration: If total requests exceed the repurchase amount, all requests are proportionally reduced.\n\nProration Example:\n\nLandsdowne Private Credit Interval Fund offers to repurchase 5% of its $800M in outstanding shares ($40M).\n\n- Investor Castlemere Capital requests redemption of $12M\n- Total redemption requests from all investors: $72M\n- Proration ratio: $40M / $72M = 55.6%\n- Castlemere receives: $12M x 55.6% = $6.67M\n- Remaining $5.33M stays invested and can be resubmitted next quarter\n\nInvestor Protections:\n\n| Protection | Description |\n|---|---|\n| Mandatory offers | Fund must make repurchase offers per its prospectus schedule |\n| Minimum 5% | Each offer must be for at least 5% of outstanding shares |\n| NAV pricing | Repurchases at NAV, not market price (no discount risk) |\n| Board oversight | Independent directors oversee fair valuation of illiquid assets |\n| Prospectus disclosure | Liquidity terms, fees, and risks must be clearly stated |\n| No secondary market discount | Unlike listed closed-end funds, no persistent market discount to NAV |\n\nLiquidity Management:\n\nInterval fund managers must balance several priorities:\n- Hold sufficient liquid assets to meet expected redemptions without forced selling\n- Avoid excessive cash drag that erodes returns\n- Maintain portfolio diversification during periods of heavy redemptions\n- Use credit facilities as a bridge to avoid liquidating positions at inopportune times\n\nPrudent managers typically hold a liquidity sleeve of 15-20% in publicly traded securities or short-term instruments, supplemented by credit facility access for surge redemptions.\n\nKey Risk:\nDuring sustained stress, consecutive quarters of prorated redemptions can trap investors. While the mandatory repurchase schedule provides better protection than tender offer funds, the 5% minimum still means it could take many quarters to fully exit a position.\n\nExplore alternative investment structures in our CFA Alternative Investments course.