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flag Quantum BioPharma shares jumped 18% on December 22, 2025, despite a class action lawsuit alleging bank stock manipulation.

flag Quantum BioPharma Inc. (QNTM) shares surged 18% to $10.52 on December 22, 2025, despite a newly filed class action lawsuit alleging that Canadian banks CIBC and RBC engaged in stock manipulation from January 2021 to October 2025. flag The lawsuit, brought by shareholder Paul Durkacz and law firm Grant & Eisenhofer, claims the banks used spoofing tactics to artificially depress the stock price. flag The company, which develops treatments for neurodegenerative and metabolic disorders, including Lucid-MS, also owns a stake in Unbuzzd Wellness and earns royalties from its product unbuzzd™. flag Trading volume spiked to 330,000 shares, far above average, as investor interest grew amid the legal developments.

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