United Microelectronics Corporation (UMC) Stock Sinks As Market Gains: What You Should Know Posted byZacks Equity Research December 2, 2021 Leave a comment on United Microelectronics Corporation (UMC) Stock Sinks As Market Gains: What You Should Know United Microelectronics Corporation (UMC) closed at $12.15 in the latest trading session, marking a -0.65% move from the prior day.