Microsoft shares advanced to record levels near $543 during the week of October 12, 2026, fueled by announcements of the Maia 300 custom AI processor and reports of over $130 billion in new data center lease commitments. The stock reclaimed a $4 trillion market capitalization for the first time since late 2025 amid 43% Azure revenue growth in the prior quarter and broad ETF inflows exceeding $260 million on a single session. Traders are monitoring the October 28 earnings release, where consensus points to $4.71 EPS and $90.6 billion in revenue, as continued capital expenditure discipline and AI monetization remain central to sustaining momentum in the Intelligent Cloud segment.