Core Viewpoint - Warren Buffett's recent investment in Pool Corp. has underperformed significantly, raising questions about the long-term potential of this stock [1][2]. Performance Analysis - Over the past year, Pool Corp.'s stock has declined from approximately $400 to around $245, representing a 33% loss for investors who bought in around the same time as Berkshire Hathaway [3]. - In contrast, the S&P 500 has increased by about 14% during the same period, indicating that Pool has underperformed the broader market by approximately 47 percentage points [4]. - Over the medium term, Pool's stock has decreased by about 26% over the last three years and 25% over the last five years, which is still poor when compared to the S&P 500's nearly 75% and 100% growth, respectively [5][7]. - The opportunity cost of investing in Pool has been substantial, with losses of about 100 percentage points over three years and 125 percentage points over five years compared to the S&P 500 [7]. Dividend Impact - Pool Corp.'s small dividend has had minimal impact on mitigating losses, with reinvesting dividends only reducing five-year losses by approximately 1.75% [8]. Future Outlook - While Pool's stock is currently struggling, there is potential for recovery if the real estate market improves, although the timing of such a recovery is uncertain [9]. - The situation serves as a reminder that even for long-term investors, continuous monitoring of investments is essential to ensure alignment with investment goals [9].