QTREX Quantum is trading at $1.72, up 11.67% in pre-market on October 6; the cause is unconfirmed. - October 5 close: $1.54, up 40.00%, following a 40.20% gain on October 2; no new announcement was reported that day. - On October 1, an industry company independently tested QTREX’s cryogenic interconnect at 20 millikelvin; the companies said they were finalizing a binding agreement. The news may support interest, but no link is confirmed; modest market gains do not clearly explain the move.