Trader consensus on Polymarket prices NVIDIA with a dominant 71% implied probability of retaining the world's largest market capitalization by December 2026, anchored by its current ~$4.9 trillion valuation leading global rankings as of mid-April 2026. Sustained AI accelerator demand, capturing over 90% market share in data center GPUs, has propelled recent revenue surges and stock gains, widening the gap versus Alphabet (12.5%) and Apple (10.5%), which face slower growth in consumer hardware and advertising. SpaceX's private valuations, recently pegged at $800 billion–$1.5 trillion amid Starlink expansion, remain distant despite IPO speculation. Key catalysts include NVIDIA's late-May Q1 earnings and macroeconomic factors like Treasury yields influencing tech multiples.