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Multiple stock trading apps, including Webull and Public, prevented users from buying shares in GameStop, AMC and Koss on Thursday, after clearing house Apex Holdings said it would no longer accept buy orders for the stocks.
Apex provides clearing services to a range of fintechs. Along with Webull and Public, SoFi — which also halted GameStop trading Thursday — uses Apex. Robinhood is a former customer, having now built out its own clearing service.