Immunitybio is trading at $9.59, down 5.29%, and the reason for the October 13 decline remains unclear. - No clear company-specific announcement or event explaining the October 13 decline was identified; the announced Piper Sandler symposium is scheduled for October 15–16, not October 13. - Major U.S. indices are nearly flat in the supplied market context, so broad-market movement does not clearly explain the drop. - Available reporting describes the prior session’s decline, not a confirmed cause for the current move.