Equity markets started the week with significant volatility as the S&P 500 and Dow Jones Industrial Average fluctuated between gains and losses. Rotation was evident, with capital flowing into financials like Goldman Sachs and JPMorgan, while software stocks remained under pressure. Amazon managed to break a nine-day losing streak, though names like Palo Alto Networks faced headwinds. E-mini S&P 500 options volume soared, with implied volatility rising to 18% as traders positioned for upcoming PCE data and potential Supreme Court rulings on tariffs.