Welcome to Bull Street Buzz — Tuesday, April 21st 2026, 6:22am — How the Iran war set Beijing up for global clean energy dominance - Politico — Dow futures fall over 350 points as Iranian war tensions escalate: Live updates - CNBC — Bitcoin, ether, solana slide, oil jumps on renewed U.S.-Iran war risks - CoinDesk — Oil prices jump after Strait of Hormuz setbacks - Axios — US stablecoins pose danger to emerging markets, say central bankers - Financial Times