Seoul hits fresh record on mixed day for Asia markets

Tech firms in the region have enjoyed a blockbuster start to the year as investors reassess their AI bets, with attention turning to "upstream" firms such as chipmakers and away from Wall Street's "downstream" companies that run apps and software. The shift has come amid growing concerns about the hundreds of billions of dollars pumped into artificial intelligence and when that will see a return, while a slew of new tools has raised fears the technology will disrupt other businesses. Still, South...