Kakao's labour dispute has moved toward the company's first headquarters strike. The Kakao union plans a four-hour partial strike and rally around Pangyo Station on June 10 and may raise the level depending on talks. The dispute began with bonus negotiations but has expanded to job security, compensation systems and organisational restructuring, putting CEO Jeong Shin-a under pressure. Talks mediated by the Gyeonggi Labour Relations Commission ended without agreement, giving unions legal grounds for industrial action.

Single-stock leveraged ETFs and ETNs tied to Samsung Electronics and SK Hynix sharpened semiconductor concentration in South Korea's stock market, with first-day turnover topping 10 trillion won. Regulators warned investors about amplified losses. Financial firms also stepped up responses to AI-driven cyber threats as the emergence of high-performance AI "Mitos" raised concerns about more sophisticated hacking, prompting authorities to review easing and possible full removal of network separation rules.