CNBC Daily Open: Is the AI sector losing its rose-colored glow?

Saul Van Beurden, Wells Fargo Co-CEO of Consumer Banking & Head of AI and Bret Taylor, Sierra Co–founder and OpenAI Chairman speaking at the CNBC AI Forum in Dallas, Texas on Oct. 1st, 2026. Carla Thorpe | CNBCHello, this is Hui Jie writing to you from Singapore. Welcome to another edition of CNBC's Daily Open.A line from Netflix's Bojack Horseman goes: "When you look at someone through rose-colored glasses, all the red flags just look like flags."For much of this year, investors viewed the AI trade through rosy lenses. This week, they put down the glasses and what they saw was clearly not pleasing.Credit stress at CoreWeave, concerns over corporate AI spending and another hot inflation report erased more than $1 trillion from 20 of the world's largest AI and semiconductor stocks this week.What you need to know todayCaution seems to be the name of the game in the AI sector now as investors worry about the amount of money that companies are splashing on AI. One example is CoreWeave, which is facing spiraling credit stress that has come into the spotlight amid a broader sell-off in AI-related names.Yields on CoreWeave debt have continued to climb, with the yield to maturity on it...