Modern asset analysis treats exit as a function of liquidity, pricing, and timing. This framing assumes that ownership positions are reversible through market exchange. For standardized financial instruments, that assumption holds. But for many real-world assets, it does not. In these contexts, exit is not simply a transaction - it is a structural transition between governance regimes. The Missing Layer: Exit Optionality The Exit Optionality Index (EOI) evaluates the structur