The stock market is a platform or system where investors can buy and sell shares of publicly traded companies. It serves as a marketplace for trading equity securities, allowing companies to raise capital from investors and providing a means for individuals and institutions to invest in the performance of those companies. The stock market is composed of various exchanges, such as the New York Stock Exchange (NYSE) and the Nasdaq, where stocks are listed and traded. Prices of stocks fluctuate based on supply and demand dynamics, influenced by various factors including company performance, economic indicators, market trends, and investor sentiment. The stock market plays a crucial role in the economy, serving as an indicator of economic health and a source of investment and capital growth for individuals and businesses.