SK Hynix's U.S. American Depositary Receipt (ADR) listing has been oversubscribed, prompting the company to cease accepting new subscriptions earlier than planned. The subscription period will close at 4:00 PM New York time on July 8, instead of the initially scheduled date. This development reflects strong investor demand for SK Hynix's ADRs, which are a popular way for U.S. investors to gain exposure to the South Korean semiconductor giant.