[JURIST] The US Supreme Court [official website; JURIST news archive] heard oral arguments [day call, PDF; merit briefs] Tuesday in Janus Capital Group v. First Derivative Traders [oral arguments transcript, PDF; JURIST report], a securities fraud case. The question before the court is whether a service provider can be held primarily liable in a private securities fraud suit for aiding and participating in another company’s misstatements. Section 10(b) of the Securities and Exchange Act [materials] prohibits any manipulation or deception…