Securities lawyers were already moving. At least four firms, including Schall, Brown & Schwartz and Levi & Korsinsky, announced investigations Monday into whether Nvidia misled investors. Robert Bartlett, a Stanford Law professor and securities law expert, expects them to have plenty of company. “I would definitely wager that there’ll be a filing,” Bartlett said in an interview Monday morning, adding that he wouldn’t be surprised if a case had been filed b