Warren Buffett's Berkshire Hathaway has made a notable investment in Constellation Brands, acquiring a 5.6 million share position valued at approximately $1.24 billion. This move comes despite Constellation's stock experiencing a decline, raising questions about its valuation. Analysts suggest that the company's forward price-to-earnings ratio of 11 and $1 billion in free cash flow may indicate it is undervalued. Meanwhile, Occidental Petroleum is set to release its earnings report, with expectations of $0.70 per share, slightly above analyst estimates. However, the company's technical trend remains weak, and it recently missed top-line estimates, reflecting potential market concerns. The S&P 500 showed a slight increase of 0.2% as Wall Street rebounded before closing, influenced in part by Buffett's investment in Constellation Brands.