Alphabet (GOOG, GOOGL), Microsoft (MSFT), Amazon (AMZN), Meta (META), and Tesla (TSLA) — the five biggest spenders on artificial intelligence — fell an average of 9%. A basket of the firms they buy from — the memory makers, server builders, and data center landlords — rose an average of 11%. The chipmaker rose 2% and added roughly $100 billion in market value, about what Microsoft and Apple lost combined. The stock lost 18% and about $250 billion, its worst week since 2022. Digital Realty (DLR), a data center landlord, rose nearly 15% on a record leasing backlog — and raised its own spending plans this week without being punished at all.