SK hynix was the most heavily net-bought stock among the top 1% of Mirae Asset Securities clients by one-month returns as of 11 a.m. on the 20th. The shares traded at 1.693 million won, up 12.87% from the previous session, after reports that the company is pursuing a share buyback and cancellation program worth about 40 trillion won ($28.8 billion). Investors expect a large-scale cancellation to reduce outstanding shares and increase per-share value, supporting shareholder returns. Samsung Electronics ranked second in net buying, trading at 270,750 won, up 9.39%, while PharmaResearch, Hana Micron and Kolmar Korea followed. KEPCO led net selling after rising 4.21%, suggesting short-term profit-taking, with Alteogen, Samsung SDI, Samsung Biologics and Kakao also among the largest net sales. Mirae Asset publishes the top traders’ activity on a real-time, prior-day and five-day basis, while warning that the data is informational, does not reflect the brokerage’s views and does not guarantee investment performance.