South Korea’s top 1% of stock investors by monthly returns shifted sharply on the morning of the 22nd, making Samsung Electro-Mechanics their largest net buy while moving SK Hynix, their leading net purchase the previous day, to the top of the net-sell list. Samsung Electronics, Korea Circuit, Samsung E&A and Isu Petasys also ranked among the five largest net buys, while Simmtech and Daeduck Electronics faced profit-taking after gains of nearly 20%. Samsung Electro-Mechanics rose 8.33% to ₩1.548 million as of 9:30 a.m., while Samsung Electronics gained 2.83% to ₩281,750. The rotation reflected expectations for stronger demand for MLCCs (multilayer ceramic capacitors) and FC-BGA substrates, as well as interest in Samsung Electronics’ record cash dividend. Separately, Orum Therapeutics plunged 27.54% after Bristol Myers Squibb halted development of BMS-986497, prompting buying by some elite traders despite the collapse. The trading occurred against a strong semiconductor backdrop: South Korean semiconductor exports rose 259.4% year over year to a record $34.1 billion during September 1–20, accounting for 47.8% of total exports.