最新报道:A new study reveals that political disagreement predicts positive stock returns, with virtual investor simulations showing stocks sparking the most debate deliver better performance. Meanwhile, partisan bias affects economic forecasts, as Republican-affiliated analysts project higher growth under GOP presidencies, impairing accuracy. Despite Meta's AI-driven ad success, broader corporate profits lag, and the S&P 500's narrow rally raises concerns, with Nvidia now at 8% of the index. OpenAI's $500B valuation debate continues as GPT-5 improves incrementally, while Google's Genie 3 LLM gains favor in AI model rankings.