WSJ’s Imani Moise reports on a volatile week where hot inflation data and rising rate fears triggered a sharp sell-off in tech and AI stocks, despite the S&P 500 marking its four-year bull market anniversary. CoreWeave led the decline as investors worried about massive AI infrastructure debt, while Apple bucked the trend to join the $5 trillion club on strong demand for its new foldable phone. The segment also highlights a surge in margin loans at Charles Schwab, driven by popular tax-aware investing strategies that have prompted the firm to raise account minimums to manage risk.