Buffett's favorite stock right now might be Occidental.In the first quarter of 2022, Warren Buffett's holding company Berkshire Hathaway (BRK.A 0.15%) (BRK.B 0.35%) revealed a massive stake in Occidental Petroleum (OXY -0.16%). At the time, Berkshire held about 91 million Occidental shares worth roughly $5 billion -- or just under 10% of the company's total share count. Today, that stake is even bigger. How much bigger? A lot bigger. This might be Buffett's favorite stock right nowBesides Berkshire's initia ...