Momentum stocks just saw one of the biggest reversals in five years. What usually happens next. - MarketWatch About the Author Share Steven Goldstein is based in London and responsible for MarketWatch's coverage of financial markets in Europe, with a particular focus on global macro and commodities. Previously, he was Washington bureau chief, directing MarketWatch's economic, political and regulatory coverage. Follow Steve on Twitter: @MKTWgoldstein. Resize AI stocks slumped on Thursday after a big run-up i ...