Quantum BioPharma Ltd. is trading at $4.16 (7.1% down) today as shares continue to sell off following an FDA clinical hold on the company's lead multiple sclerosis candidate.
- The move extends a significant multi-session decline, with the stock previously falling 8.2% on June 4 and 23.47% on June 1.
- While broader markets are currently weaker, the company-specific regulatory setback remains the primary driver of the downward momentum.