Trader consensus on Polymarket assigns a 76.5% implied probability to Alphabet retaining its current third-place market cap ranking of $3.56 trillion by April 30, driven by its substantial $787 billion lead over fourth-ranked Microsoft ($2.78 trillion) and limited trading days remaining for challengers like Amazon ($2.25 trillion) to close the gap. Apple's 21.5% odds reflect the razor-thin $199 billion separation—Alphabet trails Apple's $3.76 trillion by just 5.6%—amid year-to-date relative outperformance for Alphabet, down 6.3% versus Apple's 7.3% decline from 2025 year-end. NVIDIA's dominant $4.31 trillion top spot appears secure, pricing out other contenders below 2%, with no major catalysts in the past week but potential volatility from late-April earnings previews.