The KOSPI has experienced significant fluctuations, with reports of it plunging towards 7,200 and falling below 7,500 at some point, as well as rising 2.2% on a different occasion. The won-dollar rate has also been volatile, closing below 1,500 and weakening to around 1,530-1,539 per dollar at various times. The tech sector, including semiconductor stocks and Samsung Electronics, has been affected by a selloff, with foreigners reportedly triggering a large sell-off in the KOSPI.