QTREX Quantum is trading $0.82, up 5.03%, in pre-market; the reason for the rebound remains unclear. - It closed at $0.78 on September 22, 2026. - No confirmed company-specific announcement, earnings release, or late-breaking catalyst has been identified for September 23. - Earlier defense-deployment and quantum-interconnect announcements were dated September 2 and August 31, respectively, making them stale explanations. Broader indexes are only modestly higher.