Welcome to Bull Street Buzz — Wednesday, November 19th 2025, 1:53pm — Stock Market Today: AI Bubble Fear Rattles Stocks; Dow Drops — Live Updates - The Wall Street Journal — Microsoft, Nvidia to Invest Up to $15 Billion in Anthropic - Bloomberg.com — Google’s Sundar Pichai warns of “irrationality” in trillion-dollar AI investment boom - Ars Technica — Microsoft Agent 365 lets businesses manage AI agents like they do people - The Verge