PSI is trading 2.44% up at $159.70 in pre-market on October 2, as Micron’s record fiscal fourth-quarter revenue and stronger-than-expected outlook reinforced optimism about AI-driven semiconductor demand. - PSI gained 2.25% at the October 1 close. - PSI tracks U.S. semiconductor companies and includes Micron among its holdings; no PSI-specific announcement was identified. - Broader futures and major indices are higher, though the supplied index moves are below the 0.5% threshold.