SEC chief says Tesla case 'settled' after Musk tweet mocking it

US Securities and Exchange Commission (SEC) Chairman Jay Clayton on Monday said that SEC would not revisit Tesla's securities fraud settlement, where Tesla and CEO Elon Musk were fined $20 million each. On being pointed that Musk called SEC as 'Shortseller Enrichment Commission' after the settlement, Clayton asked, "He said that?" "As far as I'm concerned...matter is settled," he added.