CHAT is trading at $83.10 (-1.76%) in after-hours trading, as September CPI came in at 3.7% year over year, above forecasts, lifting Treasury yields and pressuring rate-sensitive technology shares. - CXMT’s DRAM progress raised competition and oversupply concerns, extending chip-stock losses. - The Nasdaq Composite fell 2.29%; CHAT had already closed down 5.09% on October 14. - The CPI surprise and chip-sector concerns were the clearest available explanations for the after-hours decline.