Will Buffett's 'put' on oil firm Occidental halt share drop?
Shares in U.S. oil producer Occidental Petroleum fell to $56.17 on Tuesday, below a level that has routinely triggered purchases by its biggest holder, billionaire investor Warren Buffett's Berkshire Hathaway. Past multimillion-share purchases were so routinely timed to drops below $60 that Wall Street analysts called it "the Berkshire put," for setting a price floor on the oil firm's shares. But Occidental has traded below that price all month, the longest period since a swoon in January that ended after Berkshire acquired 4.3 million shares in early February.