UMC experienced two consecutive limit-down days on July 17th and 20th, following TSMC's statement that mature process demand was "Not at all" robust, bursting market expectations. The Taiwan Stock Exchange weighted index rebounded 4.2% today, closing at 44,232.87 points, with UMC seeing significant trading volume.
TSMC's direct commentary on mature process demand sets pricing expectations for the broader wafer market, impacting competitors like UMC.