 Shares of Freeport-McMoRan Inc. FCX, 0.25 slipped 0.1 in premarket trading, after the copper and gold miner reported second-quarter profit and revenue that missed expectations, concerns over the global economy, higher U.S. interest rates and a strong U.S. dollar led to a precipitous decline in copper prices. Net income dropped to 840 million, or 57 cents a share, from 1.08 billion, or 73 cents a share, in the year-ago period. 