Trader consensus on Polymarket heavily favors Apple at 75.5% implied probability to remain the second-largest company by market capitalization through April's end, anchored by its current $3.76 trillion valuation versus Alphabet's trailing $3.56 trillion—a $199 billion gap widened amid recent Big Tech volatility. NVIDIA holds firm as market cap leader at $4.31 trillion on sustained AI chip demand, while Microsoft's 20% year-to-date share price decline to $2.78 trillion has relegated it to fourth, curtailing comeback odds at 0.6%. Alphabet's 20.5% positioning stems from its 93% one-year rally and prior January overtake of Apple, fueled by AI momentum in cloud and search; however, traders see limited runway to close the divide absent earnings beats or sector rotation. NVIDIA's slim 2.3% reflects remote risk of a top-two shuffle via rapid catch-up. Key watch: Q1 earnings through late April and Treasury yield shifts impacting tech valuations.