Core Viewpoint - Berkshire Hathaway's recent portfolio adjustments reflect a strategic shift towards sectors with stable cash flows, particularly consumer and energy stocks, while reducing exposure to financial stocks due to macroeconomic uncertainties [2][4]. Group 1: Portfolio Adjustments - Berkshire Hathaway completely divested from Citigroup, selling all 14.6395 million shares, and reduced its stake in Bank of America by over 7% [2]. - The company significantly increased its holdings in Constellation Brands by 113.5%, raising its position to 12.009 million shares, marking its first major investment in the alcoholic beverage sector [2]. - Energy stocks, including Occidental Petroleum and Pool Corp, were also increased, aligning with the strategy of investing in companies with stable cash flows [2]. Group 2: Key Holdings - Apple remains a cornerstone of Berkshire's portfolio, with 300 million shares valued at $66.6 billion, constituting 25% of the investment portfolio [3]. - Berkshire's long-term commitment to Apple is reinforced by confidence in its ecosystem and leadership, as highlighted by Buffett's praise for CEO Tim Cook [3]. Group 3: Cash Reserves - As of the end of the first quarter, Berkshire's cash reserves reached a record high of $334 billion, with over $300 billion invested in short-term U.S. Treasury securities [4]. - This strategy serves as a defensive measure against potential macroeconomic risks and positions the company to capitalize on high-certainty opportunities during market volatility [4]. Group 4: Investment Philosophy Evolution - Buffett's investment philosophy has evolved from "cigar butt" investing to focusing on companies with strong economic moats, emphasizing the importance of free cash flow and competitive advantages [5]. - Historical successes, such as the acquisition of See's Candies and American Express, illustrate the effectiveness of this approach, while past mistakes have reinforced the principle of investing within a defined circle of competence [5]. Group 5: Insights for Investors - The adjustments in Berkshire's portfolio highlight the pursuit of certainty, with reduced bank stock holdings indicating concerns about financial system risks and increased consumer stock investments reflecting confidence in essential markets [6]. - Maintaining a high cash ratio is not merely conservative but provides flexibility for strategic investments during crises [6]. - The strategy of focusing on cash-rich, stable consumer assets during economic uncertainty is emphasized, alongside the need for a balanced approach to technology stocks [7].