Why Occidental Petroleum Stock Jumped Today

Occidental Petroleum's (NYSE: OXY) stock price rose 4.8% on Tuesday after Warren Buffett-led Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) boosted its stake in the oil and gas company. Buffett's investment conglomerate bought more than 794,000 shares of Occidental Petroleum for roughly $55 per share on Thursday, according to a regulatory filing posted on Monday. The purchases brought Berkshire's holdings in the energy provider to over 153.5 million shares -- a stake valued at nearly $9.5 billion.