Meta shares suffered a sell-off on Thursday, impacting US tech stocks as concerns over AI spending grew. Despite this setback, Meta reported a healthy $64 billion in Q3 revenue and announced a stock split. Meanwhile, the US government is investing a speculative nuclear fusion project with backers linked to former President Donald Trump. The European space sector is also facing challenges due to the Starlink saga. The Financial Regulatory Authority cleared model short-selling contracts, and Blackstone is testing $10 billion to assess banks' AI risks. Axel Springer's co-owner is considering acquiring TikTok's European division.