Billionaire Steve Mandel Just Sold Microsoft Stock to Buy This Dominant Artificial Intelligence (AI) Stock Up Nearly 800% Over the Past Decade

Billionaire investor Steve Mandel's Lone Pine Capital strategically reduced its Microsoft stake in Q2 to increase exposure to Amazon, viewing Amazon Web Services (AWS) as a core AI investment driver. While AWS's Q2 sales rose 17% to $30.9 billion, its superior margins allowed it to contribute 53% of Amazon's operating profit on just 18% of total revenue. This portfolio shift reflects a conviction that Amazon's improving profitability, driven by high-margin AWS and advertising segments, positions it for long-term outperformance against Microsoft, despite similar valuations.

Analysis

Hedge fund Lone Pine Capital's Q2 portfolio reallocation, which involved trimming its Microsoft position by approximately 5% to fund an investment in Amazon, signals a strategic preference for Amazon's profit growth trajectory within the AI sector. The core of this thesis is Amazon Web Services (AWS), which, despite a 17% revenue increase to $30.9 billion in Q2—a slower pace than Microsoft Azure and Google Cloud's over 30% growth—demonstrates superior profitability. AWS contributed 53% of Amazon's total operating profit while representing only 18% of its revenue, highlighting its critical role in expanding the company's overall margins. The argument for favoring Amazon hinges on this margin expansion dynamic; with high-margin segments like AWS and advertising growing fastest, Amazon's operating income is projected to grow more rapidly than Microsoft's. This potential for accelerated profit growth, coupled with a similar forward price-to-earnings valuation for both companies, underpins the view that Amazon may offer greater long-term outperformance.

Key Decisions for Investors

• Investors should analyze Amazon not just as an e-commerce company but as a primary AI play, focusing on the operating margin expansion driven by the high-profitability AWS segment.
• Consider the relative value proposition between Amazon and Microsoft; the thesis presented suggests that Amazon's potential for faster profit growth may offer more upside than Microsoft's faster cloud revenue growth, given their similar valuations.
• Monitor AWS revenue growth in upcoming quarters, as its 17% rate lags key competitors, posing a risk factor if the gap widens or if its contribution to operating profit falters.
• Note the conflicting sentiment, as the article's bullish case for Amazon is contrasted by its explicit exclusion from The Motley Fool's recent '10 best stocks' list, suggesting a need for further due diligence.