NVIDIA’s commanding position in AI semiconductor demand, reinforced by its latest quarterly results showing revenue more than doubling year-over-year and data-center sales surging 117 percent, underpins the 83.5 percent market-implied probability it will hold the largest market capitalization at end-December 2026. With its shares near record levels and an expanded $235 billion buyback authorization, traders see limited scope for Apple’s $4.94 trillion valuation or Alphabet’s $4.22 trillion to close the roughly $600 billion gap in the remaining weeks. Apple’s solid services growth and iPhone cycle provide a secondary path, reflected in its 14.9 percent implied odds, while other names trail further behind. Near-term earnings releases and AI spending updates remain key swing factors for these market-cap rankings.