Welcome to Bull Street Buzz — Thursday, April 30th 2026, 12:11pm — Families of Canadian mass shooting victims sue OpenAI, CEO Altman in US court - Reuters — S&P 500 is little changed as oil rises, traders brace for Fed decision and Big Tech earnings: Live updates - CNBC — Uber is in the hotel business now, thanks in part to AI - TechCrunch — ‘Thoughts and prayers’: The minefield that awaits Kevin Warsh at the Fed - Politico — Bill Ackman's $5 billion Pershing Square IPO to start trading, testing Berkshire-style vision - CNBC