World shares were mixed on Thursday after China rolled out more moves to try to boost its lagging stock markets by raising confidence that prices will rise. Germany's DAX gained 0.2% to 21,300 and the CAC 40 in Paris edged 0.

DeepSeek released an open-source artificial intelligence model in December, saying it took only two months and less than $6 million to create it.

By Lawrence Delevingne, Samuel Indyk and Tom Westbrook BOSTON/LONDON/SINGAPORE (Reuters) -U.S. stock futures steadied, the dollar ticked higher and tech stocks in Asia slid on Tuesday following a wave of selling as apparent advances by a Chinese AI startup cast doubt on U.