[Top 20 US stock turnover: Nvidia canceled next week's AI Summit in Israel] No. 2 Nvidia closed down 1.08%, trading $18.339 billion. Nvidia said it was cancelling plans to host a live Artificial Intelligence (AI) summit in Tel Aviv, Israel, on October 15-16. Nvidia once highlighted the size of Israel's more than 6,000 startups and the amount of VC investment per unit, making the AI summit expected to highlight Israel's status as "one of the most dynamic tech hubs in the world." According to the original plan, about 2,500 developers, researchers, and technologists will attend the summit, which will focus on generative AI, supercomputing and large language models, automobiles, health care, and cybersecurity.