NVIDIA commands a trader-implied 99% probability of remaining the world's largest company by market capitalization at the end of April, backed by its $4.6 trillion valuation—over $700 billion ahead of Alphabet and Apple—fueled by unrelenting demand for its AI accelerators like the Blackwell GPUs in data center builds. Recent catalysts include NVIDIA's GTC 2026 announcements signaling a $1 trillion annual AI infrastructure spend trajectory and partnerships such as Meta's multi-million chip orders, solidifying its GPU monopoly amid booming CapEx from hyperscalers. With just two weeks to resolution, challenges would require a catastrophic 15-20% NVDA stock plunge—perhaps from AI hype cooldown or antitrust probes—or unprecedented surges from rivals like Apple's late-April earnings, though historical precedents suggest stability in such leads.