IUSG is trading at $191.26, down 3.38%, with no confirmed post-close technology-sector catalyst. - The after-hours decline contrasts with gains in the Nasdaq and S&P 500 during the regular session; technology shares rallied, with Nvidia among the gainers. - No confirmed post-close technology-sector mover or holding earnings result was identified. - The White House AI task force announcement is notable, but available evidence does not connect it to the sharp after-hours drop.