How do compound real options work and when do I need them?

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AcadiFi · Accepted Answer

A compound option is an option on an option. In capital budgeting, a Phase 1 investment may create not direct cash flows but the right to make a Phase 2 investment...

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Geske (1979) derived closed-form compound call pricing under standard assumptions. Practitioners typically use binomial or Monte Carlo on the underlying cash-flow distribution.

At Nectarwave: a $30M platform investment provides the right (not obligation) to spend $120M on product commercialization if the underlying product PV exceeds threshold by year 3. But the commercialization itself creates expansion options into adjacent indications worth X in expectation. You cannot value Nectarwave's platform with a single call — you need a nested option.

Step-by-step: (1) Value the innermost option first (expansion into adjacent indications): a call with strike equal to expansion capex, underlying the PV of expansion cash flows. (2) Add that option value into the underlying of the outer option (the commercialization investment). (3) Value the outer call. (4) Compare to the $30M platform cost.

For AcadiFi CFA candidates: recognize compound optionality when projects build 'capabilities' rather than direct revenue — R&D platforms, new-market entry, modular factory investments. Standard DCF systematically undervalues these by 30-60% in empirical studies. That mispricing is often why visionary projects fail internal approval even though they create enormous strategic value. Compound option analysis corrects this bias.

How do compound real options work and when do I need them?

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