The Wall Street Journal
Commodity Stocks Slip Before the Bell
Shares of commodity companies are falling in premarket trading as oil and metal prices come under pressure from China’s slowing economy. [Occidental Petroleum](https://www.wsj.com/articles/warren-buffett-loves-occidental-should-you-11659550708), Devon Energy, Marathon Oil, miner Freeport-McMoRan and oil-services firms Baker Hughes and Schlumberger are all down 2.5% or more. Oil-and-gas shares have been the big winners in the U.S. stock market this year. The energy sub-index of the S 500 has surg