On the one hand, US controls on exports of high-tech goods to China are threatening to reduce access to a major market; and on the other, Beijing's push for technological independence in areas such as chip production raises the possibility of a China-based competitor.

Reports that China has started mass-producing homegrown DUV lithography machines actually describe two separate developments being treated as one. A Shanghai firm linked to…

ASML stock tumbled on a report of competition emerging in China. It was among the biggest losers on the Philadelphia semiconductor index.

Home-grown chipmaking tools could shield Beijing from further Western restrictions