Polymarket traders price Apple at 95.6% implied probability of remaining the third-largest company by market capitalization through May 31, reflecting its entrenched $4.3 trillion valuation—trailing Alphabet's $4.65 trillion by roughly 7% but leading Microsoft's $3.0 trillion by over 40%. This strong consensus stems from stable gaps amid modest gains across Magnificent Seven stocks this week, driven by sustained AI demand and positive economic data, with no major catalysts like earnings reports in the final two weeks to disrupt hierarchies. Recent Alphabet momentum closing on Nvidia has not eroded Apple's buffer below, as relative share price volatility remains contained. Realistic challenges include an improbable 10%+ Apple underperformance versus Alphabet, dropping it to fourth, or a synchronized Microsoft surge beyond historical norms—both low-likelihood amid current trader sentiment backed by real capital at stake.