Jensen Huang, CEO of NVIDIA, arrives for the Inaugural AI Insight Forum in Russell Building on Capitol Hill, on Wednesday, September 13, 2023.Tom Williams/CQ-Roll Call/Getty ImagesNvidia's stock surged 25% since September, nearing its all-time high.OpenAI's $6.6 billion funding last week preceded the stock's ascent.Two other key factors signal ongoing demand for AI computing.A steady flow of news has added up to a banner month for Nvidia, as investors seem to have let go of some of their trepidation around generative AI — at least for now.By Wednesday's market close, Nvidia's stock was up nearly 25% since September, bringing it closer to once again being the most valuable company in the world.