[3/7 00:00] OpenAI Codex Security AI Agent Launch / S&P 500 AI-Concentrated Rebalancing

AI News Flash for March 07, 2026 at 00:00 UTC. Topics: 1. OpenAI Codex Security AI Agent Launch https://www.pymnts.com/news/artificial-intelligence/2026/openai-challenges-security-giants-with-new-ai-agent/ 2. S&P 500 AI-Concentrated Rebalancing https://247wallst.com/investing/2026/03/06/lumentum-coherent-and-vertiv-added-to-the-sp-500-as-ai-stocks-dominate-rebalancing/ 3. Meta AI Glasses Class Action Lawsuit https://techcrunch.com/2026/03/05/meta-sued-over-ai-smartglasses-privacy-concerns-after-workers-reviewed-nudity-sex-and-other-footage/ 4. AI Coding Security Gap https://www.axios.com/2026/03/06/openai-codex-security-ai-cyber