MediaTek is trading 4.74% down at TWD 4,920.00, based on the supplied price context for the October 6 close; no confirmed company-specific catalyst was identified. - The October 6 Wi-Fi 8 showcase was reported, but available coverage does not link it to the share move. - Taiwan’s benchmark index rose 2.55% in the previous session; available evidence does not establish a broad-market explanation. The cause remains unconfirmed.