This document provides an overview of financial markets and institutions. It begins by defining key terms like financial system and financial markets. It then describes the basic structure and functions of financial markets, including the main instruments traded in debt, equity, money, and capital markets. The document also outlines the primary roles and types of financial institutions, with a focus on financial intermediaries. It concludes by discussing some of the key reasons for regulating financial systems, such as increasing information for investors and ensuring the soundness of financial intermediaries.