On February 23, the U.S. Court of Appeals for the Fourth Circuit reversed a mid-trial grant of judgment as a matter of law against the Securities and Exchange Commission in a jury trial for insider trading.  The decision in SEC v. Clark is a reminder that the SEC can meet its burden of proof by presenting merely circumstantial, rather than direct, evidence of insider trading and that a trial court must not weigh evidence, determine witnesses’ credibility, or substitute its judgment for the jury’s in deciding whether to grant a motion for judgment as a matter of law.