The monograph presents a comparative analysis of the scientific approaches of Western and domestic economic schools to the structure of the financial market, shows its place in the architectonics of the financial and economic system: hierarchy, structure, functional clusters and assessment methods, determines the determinants, current trends and the role of financial markets in the mechanism of investment support of the economy in the context of digital transformation. The subsystem of the capital market, global exchange infrastructure, MFC and initial public offering markets was investigated.