Warren Buffett just bought $400 million of this stock

Core Insights - Berkshire Hathaway, led by Warren Buffett, has been actively trading Occidental Petroleum (OXY) stock, with significant purchases made in December 2024, including nearly 9 million shares [3][4][10] - The investment in Occidental Petroleum has shown mixed results, with the stock initially purchased at an average price of $47, dropping below$10 during the COVID-19 crisis, but currently trading at $48.08, indicating a slight profit for Buffett [4][5] - Despite the recent stock price increase, Occidental Petroleum shares are down 19.94$13 billion as of the end of the last trimester [9] - The company has been diversifying its portfolio, with additional investments in SiriusXM and Verisign, indicating a broader strategy beyond just oil investments [10][11] - The stock performance of Occidental Petroleum has been relatively weak, with only a minor rally observed following political events, such as Donald Trump's re-election [7]