: Since markets are unpredictable, probability is used to model random outcomes. It provides the foundation for determining the likelihood of various financial scenarios.

Practitioners use these concepts to build models that inform actual market decisions: Core Concepts of Financial Mathematics - Monash University

Modern financial systems are constructed using a specific set of mathematical "building blocks":

The Concepts and Practice of Mathematical Finance Mathematical finance, often called quantitative finance, is the field of applied mathematics concerned with the modeling and analysis of financial markets. It serves as a bridge between theoretical economic principles and the practical realities of high-frequency trading, risk management, and derivative pricing. While traditional finance might rely on qualitative research, mathematical finance prioritizes numerical data and rigorous logic to quantify uncertainty and maximize returns. Core Mathematical Concepts