The Globe and Mail reports in its Tuesday edition that Quantum Biopharma is suing CIBC World Markets and RBC Dominion Securities, alleging that the broker-dealers allowed an illegal trading tactic known as spoofing to manipulate its share price. The Globe's Alexandra Posadzki and David Milstead write that Quantum Biopharma filed the lawsuit on Sunday in New York. The suit also names 10 "John Does," entities that could include market-makers, subsidiaries, affiliates and sister companies, as well as customers of the defendants, whose identities are currently unknown. Quantum Biopharma alleges that the defendants either engaged in spoofing for their own proprietary accounts, or failed to fulfill their duties as gatekeepers. The alleged spoofing, which utilized high-speed algorithmic computer systems, occurred between Jan. 1, 2020, and Aug. 15, 2024, according to the company, which claims it has suffered significant damages and is seeking $700-million (U.S.) in damages. Quantum Biopharma alleges the defendants placed thousands of spoofing sell orders, creating the illusion that the share price was declining in order to bait other investors into selling their shares, which would drive the price down even further.