코스피 (KOSPI) is the main stock market index of South Korea, representing the performance of the country's largest publicly traded companies. It is managed by the Korea Exchange and serves as a key indicator of the overall health of the South Korean economy. The index includes various sectors, such as technology, finance, and manufacturing, reflecting the diverse nature of the market. Investors use the 코스피 to gauge market trends and make informed decisions about buying or selling stocks in South Korea.