US stock markets tumble as investors worry about DeepSeekBy Maria Aspan (NPR)Jan. 27, 2025 5:22 p.m. Updated: Jan. 28, 2025 4:07 p.m.📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up