Why UMC stock is up 16% today: 8-inch price hike talk meets Taiwan’s CPO buzz
New York, January 20, 2026, 12:53 ET — Regular session Shares of United Microelectronics Corp surged roughly 16% Tuesday, pushing the Taiwan chipmaker to lead the semiconductor sector while broader U.S. markets dipped. UMC climbed $1.52 to $10.82, hitting an intraday high of $10.93. This shift is significant as investors target “mature-node” chips—older manufacturing tech still crucial for power chips,…