Jim Cramer said the AI data center trade is reclaiming market leadership, highlighting six stocks that led Wednesday's rally and all finished the session higher. Nebius rose 34% and CoreWeave gained 19%, far ahead of the S&P 500's 0.26% advance. Cramer said the group had lagged financials, healthcare and retail for weeks, but the latest move suggested investors were rotating back into AI infrastructure names. All six stocks have beaten the S&P 500 this year, though they remain below their 2026 peaks.