Ideaya Biosciences is trading at $43.00, up 8.29%, with biotech-sector momentum the strongest identifiable explanation; no clear company-specific catalyst has been identified. - The move follows a recovery from an unusual September 22 after-hours decline. - Biotech ETF XBI is up 2.61% pre-market, supported by several positive biotechnology developments. - Constructive analyst commentary was published September 22 but does not directly explain the move.