Celestica is trading at $378.56, up 4.62%, with no fresh company-specific catalyst confirmed. - Shares have advanced across multiple sessions, from $316.81 on September 15 to the current level. - Available coverage points to ongoing AI-infrastructure optimism following earlier second-quarter results; no September 24 company announcement, earnings release, or analyst action clearly explains the move. - Broader markets are slightly weaker, and the gain appears primarily stock-specific or flow-driven, though the exact catalyst remains unconfirmed.