QTREX Quantum is trading 11.33% lower at $1.41, with broad-market weakness the clearest context. - No fresh company-specific catalyst was identified for the October 7 decline; latest company news was independent cryogenic-interconnect testing announced October 1. - Shares rallied from $0.68 on September 30 to $1.59 on October 6. - Elevated Treasury yields and oil, plus caution ahead of Federal Reserve minutes, are pressuring equities; the S&P 500, Nasdaq and Dow are all down more than 0.5%.