{"slug": "ai-driven-rotation-reshapes-stock-market-leadership", "title": "AI-driven rotation reshapes stock market leadership", "summary": "Palo Alto Networks and CrowdStrike hit all-time highs as investors rotated out of semiconductors into AI-security stocks, driven by Zhipu AI's open-weight model rivaling Anthropic's restricted model at finding software vulnerabilities. The S&P 500 rose 9.6% in the first half of 2026, while the Russell 2000 posted its best first-half gain since 1991.", "body_md": "**Palo Alto Networks** and **CrowdStrike** hit all-time highs this week as Wall Street's holiday-shortened session showed investor capital rotating out of semiconductors and into AI-security stocks, CNBC reports. The PHLX Semiconductor Index fell 6.3% Wednesday and 5.4% Thursday even as the **S&P 500** closed the first half of 2026 up 9.6% and the **Russell 2000** posted its best first-half gain since 1991, near 22%. CNBC linked part of the cybersecurity rally to Wall Street Journal reporting that Zhipu AI's open-weight GLM-5.2 model now rivals Anthropic's restricted Mythos model at finding software vulnerabilities, a signal investors read as raising near-term demand for AI-security spending. The Dow closed at a record Thursday after a soft June jobs report reduced near-term Fed rate-hike odds, with markets closed Friday for the holiday.", "url": "https://wpnews.pro/news/ai-driven-rotation-reshapes-stock-market-leadership", "canonical_source": "https://letsdatascience.com/news/ai-driven-rotation-reshapes-stock-market-leadership-dc767e6c", "published_at": "2026-07-03 15:51:06+00:00", "updated_at": "2026-07-03 21:09:53.224766+00:00", "lang": "en", "topics": ["ai-safety", "ai-research", "ai-products"], "entities": ["Palo Alto Networks", "CrowdStrike", "S&P 500", "Russell 2000", "Zhipu AI", "Anthropic", "CNBC", "Wall Street Journal"], "alternates": {"html": "https://wpnews.pro/news/ai-driven-rotation-reshapes-stock-market-leadership", "markdown": "https://wpnews.pro/news/ai-driven-rotation-reshapes-stock-market-leadership.md", "text": "https://wpnews.pro/news/ai-driven-rotation-reshapes-stock-market-leadership.txt", "jsonld": "https://wpnews.pro/news/ai-driven-rotation-reshapes-stock-market-leadership.jsonld"}}