A stock market allows companies to raise capital by selling shares of ownership (stocks) to investors. Stocks are traded on stock exchanges between buyers and sellers. Key components of a stock market include stock exchanges that list company share prices, companies that are publicly listed, shares that represent ownership proportions, and brokers that facilitate trades between buyers and sellers. A company's stock price fluctuates based on supply and demand, as well as external economic factors like recessions, inflation, and job cuts.