Rigetti Computing is trading 4.1% down at $13.46, with no clear company-specific catalyst identified for the October 12, 2026 decline. - A planned 2027 quantum-system deployment with HPE and the Pittsburgh Supercomputing Center was reported before the session, but does not explain the decline. - Broader indices are mixed and moving less than 0.5%, providing no established broad-market explanation. - Quantum stocks have faced pressure amid technology sell-offs and macroeconomic uncertainty, but available coverage does not confirm these as today’s driver.