Meta shares experienced a sharp decline on Thursday, affecting US tech stocks as fears over AI spending rose. Despite this downturn, Meta reported a strong $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 confronting challenges due to the Starlink saga. The Financial Regulatory Authority approved model short-selling contracts, and Blackstone is evaluating $10 billion to review banks' AI risks. Axel Springer's co-owner is looking into acquiring TikTok's European division.