Yahoo Finance's John Hyland tracks today's top moving stocks and biggest market stories in this Market Minute, including President Trump stating he will announce the next Federal Reserve chair in early 2026, American Bitcoin (ABTC) stock plunging by nearly 40%, and Instacart (CART) — which operates as Maplebear, Inc. — stock drops on Amazon's (AMZN) offering of ultra-fast deliveries. Catch Yahoo Finance's full interview with American Bitcoin co-founder and chief strategy officer Eric Trump from our 2025 Invest conference in November. Stay up to date on the latest market action, minute-by-minute, with Yahoo Finance's Market Minute.