Core Insights - Warren Buffett officially retired on December 31, 2025, marking the end of his career and drawing attention to his investment strategies at Berkshire Hathaway [1] - In November 2025, Berkshire released its last 13F report under Buffett, revealing that Apple constituted 22.69% of its portfolio, while Berkshire made its first investment in Alphabet, ranking it as the tenth largest holding [1] - Buffett's shift towards investing in technology stocks, particularly Alphabet, challenges the notion that value investing is incompatible with tech investments [1][2] Group 1 - Buffett's historical avoidance of technology stocks was due to concerns over their uncertain profit models and unclear competitive advantages, which initially aligned with his value investing principles [2] - Over the past 20 years, Berkshire's investment portfolio has evolved, with significant investments in technology companies like IBM, Apple, and now Alphabet, indicating a shift in Buffett's strategy [2][3] - The characteristics of Apple, such as brand loyalty and predictable earnings, align with value investing standards, which also apply to Alphabet's diverse revenue streams and strong competitive position [3] Group 2 - Buffett's adjustments in holdings before retirement set a precedent for value investing in the AI era, redefining the concept of competitive advantages in technology [3][4] - The focus for global investors should shift from whether a stock is a tech company to evaluating predictable cash flows, strong competitive moats, and effective management in the context of ongoing technological advancements [4]