Critical minerals and investment frameworks: Formalizing the bankability framework

Private investment in critical mineral projects is arguably not scaling at the pace required to meet projected demand, despite adequate reserves and abundant long-duration capital. The binding constraint is bankability. A recent policy framework matches mineral market structure, jurisdictional risk, and project lifecycle stage to six policy instruments; its core insight, that bankability failures are market- and stage-specific, is correct. The framework states the right principles but stops short of an operational decision procedure: it provides no rule for sequencing instruments when the dimensions conflict, no additionality test, and no hierarchy separating supply adequacy from geographic diversification and domestic industrial policy. This paper formalizes and extends the framework. It supplies three additions: a binding constraint protocol with a proved existence-and-uniqueness result, a formal crowding-in test with automatic step-down provisions, and an explicit objective hierarchy that makes the cost of resilience-motivated interventions transparent. It also documents corrections to the case-study evidence base underpinning several instrument categories. • Midstream refining has distinct economics that mine-lifecycle instruments misaddress. • A binding-constraint protocol pinpoints the primary friction gating financial close. • A crowding-in test gates public support and withdraws it as project risk declines. • An objective hierarchy exposes the cost of resilience-motivated diversification.