 Today's advances were driven by mega-cap tech stocks, with Microsoft and Apple hitting all-time record closes. And shares of Boeing rose 2% after the aerospace giant agreed to buy its key parts supplier, Spirit Aerosystems, that it split off two decades ago in an all-stock deal worth around $4.7 billion. The Dow winners Apple, Microsoft, and JPMorgan Chase. The Dow decliners UnitedHealth Group, Home Depot, and Caterpillar.