The S&P 500's internal divergence, where new lows outnumbered new highs, was last observed on Dec. 21, 1999, just months before the Dotcom Bubble top. Analysts note that the S&P 500's gains were led by communication services, information technology, and consumer discretionary sectors, with some of these still significantly below their highs. This suggests leadership is battling against weaker near-term performance, making it easier for new lows to form than new highs. If Middle East tensions persist, energy prices remain high, and the Fed continues hiking rates, similar trading days could occur.