South Korea's KOSPI closed at 7,007.72 on September 21, rising 113.49 points, or 1.65%, to finish above 7,000 for the first time in seven sessions. Semiconductor shares led the advance as expectations for expanded AI-memory supply, stronger memory-chip pricing and record export demand improved sentiment. Samsung Electronics closed at 272,000 won, up 12,000 won, while SK hynix gained 0.59% to 1.86 million won. Korea Customs Service data showed semiconductor exports reached a record $34.12 billion in the first 20 days of September, up 259% from a year earlier and accounting for 47.8% of total exports of $71.4 billion. Chip shipments to China more than doubled to $16.6 billion, while exports to the U.S. rose 118% to $14.2 billion. The figures helped lift chip shares globally after a recent AI-driven selloff, with Intel, Micron and AMD advancing in U.S. premarket trading. The latest account reported net KOSPI purchases of about 142 billion won by foreign investors and 285 billion won by institutions, while individuals sold about 418 billion won. This differs from an earlier report that put institutional buying at 1.4923 trillion won and foreign selling at 160.2 billion won. The KOSDAQ rose 1.11% to 836.27, while the won strengthened to 1,381.0 per dollar as improved risk appetite and a weaker global dollar weighed on the exchange rate.