NVIDIA is trading 4.03% higher at ARS 15,730.00, with no confirmed catalyst identified. - The S&P 500 is down 0.44% and Nasdaq is down 0.62%; broad-market strength does not explain the gain. - On September 28, NVIDIA announced the Open Agent Safety Platform, an open software platform and reference design for AI security from testing to deployment; no source explicitly attributes the move to it. The DOJ Groq antitrust inquiry is earlier news, not a confirmed fresh catalyst.