CNBC Daily Open: Unstable tariff situation and new AI disruption spark market sell-off

Group 1: Cybersecurity Sector - Investors lost confidence in cybersecurity companies following Anthropic's launch of Claude Code Security, which can scan code for vulnerabilities and suggest solutions, leading to a decline in shares of CrowdStrike, Palo Alto Networks, and Cloudflare, with IBM experiencing the largest drop of nearly 13.2% [1] Group 2: European Markets - The Stoxx 600 index in European markets fell by 0.45%, primarily due to a significant drop of over 15% in Novo Nordisk's stock after disappointing trial results for its next-generation weight loss drug [2] - The cryptocurrency market also faced a downturn, with Bitcoin losing more than 5% and falling below $63,000, nearly half of its record high of over $125,000 reached in October [2] Group 3: Trade and Economic Uncertainty - The European Union's trade deal with the U.S. is currently "on hold" following a Supreme Court ruling deeming Trump's "reciprocal" tariffs illegal, contributing to market uncertainty described as "pure tariff chaos" by Bernd Lange [3] - Bill Winters, CEO of Standard Chartered, highlighted that uncertainty around trade tariffs is problematic, although not as severe as in April, and it hampers investment [4] Group 4: Competition in the Electric Vehicle Sector - Intense competition, particularly in the Chinese electric vehicle sector, is leading to destructive cost-cutting measures, raising questions about the future trajectory of rivalry between the U.S. and China [5]