Wall Street has sharply declined amid rising economic uncertainties, doubts over AI investments, and new tariffs announced by the Trump administration, which are expected to hinder global growth and impact American purchasing power. The Nasdaq 100 is testing critical support around 20,500 points, with a potential correction to 19,000 points if economic data continues to disappoint, particularly regarding unemployment. The current market shows increased fragility, with low participation indicators despite the index nearing highs.