Stock exchanges play a crucial role in the global economy by providing a platform for the buying and selling of stocks, bonds, and other securities. They serve as a barometer for the overall health of the economy, as stock prices tend to rise when the economy is strong and fall when it is weak. Stock exchanges also provide companies with a way to raise capital by issuing stocks and bonds, which can be used to fund expansion and growth. Additionally, they provide investors with an opportunity to earn a return on their investment through capital appreciation or dividends. Overall, stock exchanges play a vital role in facilitating economic growth by providing a mechanism for the efficient allocation of capital.