The chapter discusses the fundamentals of financial markets, including the primary functions of capital and money markets. It defines key terms like underwriters, brokers, dealers, and clearing and settlement. It also describes the different types of markets that exist for various financial claims, including primary and secondary markets, organized exchanges and over-the-counter markets, spot and futures markets, and options markets. The roles of different participants in the markets are discussed along with how the markets promote efficiency through allocating resources, disseminating information, and keeping transaction costs low.