PSI is trading at $134.67, down 5.78% in pre-market on October 13, amid a broader semiconductor sell-off. - PSI fell 4.28% at the October 12 close. - Overnight reports cited Chinese memory-chip competition and concerns about the financing and returns of AI infrastructure as pressures on chip stocks. - No PSI-specific announcement was identified; sector weakness is the clearest available explanation, with medium confidence and no direct PSI-specific report confirming the cause.