US tech stocks tumbled after advances by Chinese start-up DeepSeek ignited worries over whether America could sustain its lead in artificial intelligence. Latin American leaders will hold an emergency summit to respond to President Donald Trump’s mass deportations of migrants, and Starbucks is cracking down on non-customer access to its stores.

Mentioned in this podcast:

Advances by China’s DeepSeek sow doubts about AI spending

Tech stocks slump as China’s DeepSeek stokes fears over AI spending

‘Back to 1897’: Latin America scrambles to respond to Donald Trump’s aggression

Starbucks cracks down on freeloaders to reverse sales decline

Tech Tonic

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The FT News Briefing is produced by Niamh Rowe, Fiona Symon, Sonja Hutson, Kasia Broussalian, Lulu Smyth, and Marc Filippino. Additional help from Breen Turner, Sam Giovinco, Peter Barber, Michael Lello, David da Silva and Gavin Kallmann. Our engineer is Joseph Salcedo. Topher Forhecz is the FT’s executive producer. The FT’s global head of audio is Cheryl Brumley. The show’s theme song is by Metaphor Music.

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China’s DeepSeek AI triggers tech sell-off

FT News Briefing