Nvidia's market cap reached $5.366 trillion as of May 2026, making it more valuable than every country's economy except the US and China. The company became the foundational infrastructure provider for generative AI, driving this unprecedented valuation. The achievement highlights both the market's confidence in AI's economic potential and the concentration of value in a single company—investors are increasingly betting trillions on Nvidia's ability to maintain dominance in chip supply for AI systems.