The CM series forms the mathematical foundation of the actuarial Core Principles stage. These two subjects train you to model, value, and reserve for financial and insurance cash flows — skills that underpin virtually every later specialist exam. CM1 builds the deterministic toolkit — interest theory and life contingencies. CM2 then extends that thinking into a stochastic, market-based world — modelling investment risk, pricing derivatives, and reserving for general insurance liabilities. Together, they’re where you build the modelling instincts you’ll rely on for the rest of your actuarial career.