QTREX Quantum is trading 8.33% up at $1.67 after-hours; the move’s direct cause is unconfirmed. - It closed at $1.54 on October 5, up 40.00%, following a 40.20% gain on October 2. - No new October 5 company announcement was identified. - An October 1 report said a leading quantum-computing company independently tested QTREX’s interconnect at 20 mK; QTREX said it was finalizing a binding agreement and expected to disclose details within weeks.