Korea's representative stock index comprising all stocks listed on the KRX main board. • Samsung Electronics accounts for ~25-30% of the index — Samsung essentially IS KOSPI • Foreign investors hold ~30%, their trading patterns drive index direction • Heavy semiconductor weight (Samsung, SK Hynix) makes it sensitive to global chip cycles • Known for trading in a 2,000–2,800 range ('Box-pi') Inversely correlated with USD/KRW (stronger won → higher KOSPI). Three key drivers: US markets, China's economy, and semiconductor exports.