Blaize Holdings is trading $0.26, up 8.29%, with sector momentum the most plausible available explanation; no direct catalyst was confirmed. - Supplied sector context reports SOXX up 2.61% after-hours, following a regular-session rebound. - No new company-specific announcement dated October 21 appeared in available reporting. - Blaize’s latest listed release, October 16, covered preferred shares intended to facilitate a reverse stock split if necessary; reporting does not link it to the move.