The Motley Foolยท2025-11-20 08:45Core Viewpoint - Warren Buffett has identified Alphabet as a new favorite stock in the quantum computing sector, alongside his existing investment in Amazon, indicating a strategic shift in Berkshire Hathaway's portfolio towards companies involved in advanced technologies [1][4][2]. Company Investments - Berkshire Hathaway has increased its investment in Alphabet by acquiring over 17.8 million Class A shares, valued at more than $5 billion, which is more than double its position in Amazon [4]. - Amazon Web Services (AWS) is developing a quantum computing chip called Ocelot, aimed at reducing costs related to quantum error correction, and offers cloud-based quantum computing services through its Amazon Braket platform [3]. Quantum Computing Advancements - Alphabet's Google Quantum AI is a leader in quantum computing, having achieved significant milestones, including a calculation that would take traditional supercomputers 10,000 years to complete in just 200 seconds [5]. - Google Quantum AI has also demonstrated a prototype of a logical qubit and advancements in quantum error correction, showcasing its potential in the quantum computing field [5]. Advertising Business Strength - Alphabet's advertising business generated $74.2 billion in revenue in the third quarter of 2025, highlighting its robust performance and attractiveness to investors [7]. - Buffett's investment in Alphabet is likely driven more by its strong advertising business rather than solely its quantum computing initiatives [6][8]. Future Prospects - The integration of artificial intelligence (AI) into Alphabet's operations, particularly in Google search and Google Cloud, is expected to enhance its market position [9][10]. - Alphabet's Waymo, a leader in the autonomous ride-hailing market, is also seen as a promising area for future growth [10]. - Quantum computing is anticipated to present significant opportunities for Alphabet in the long term, reinforcing its status as a key player in the technology sector [11].