Stock Market Today: Nasdaq Leads Indexes Down; SpaceX Slides As Flight Canceled (Live Coverage)

U.S. stocks opened sharply lower as a broad market selloff was driven by heavy losses in Netflix and Intuitive Surgical, with the Nasdaq down 2.1%, the S&P 500 down 1.2% and the Dow off 1% shortly after the open. The article highlights a risk-off tone across major indexes and growth stocks, while ETF pressure was visible in QQQ and SPY. Among notable movers, Nvidia, Amazon and Caterpillar fell in premarket trading, while Procter & Gamble and Johnson & Johnson held up better. SpaceX/Space Exploration Technologies also sold off after canceling a Starship test flight due to an engine ignition failure, adding to the negative sentiment in the article. Overall, the piece reflects a day of broad market weakness led by earnings disappointment and company-specific setbacks.