A New York federal judge has ordered Jay-Z to testify on May 15 in an investigation by the U.S. Securities and Exchange Commission. The investigation involves the sale of the rapper’s Rocawear clothing brand to Iconix Brand Group. Jay-Z, whose real name is Shawn Carter, had failed to respond to SEC subpoenas served to him in November and February. “The testimony has been delayed for five months, and I do not intend to tolerate any further delay,” he said. U.S.