Diana Linn, account manager at Adviser Investments, has the market analysis for Thursday, September 27. All major U.S. stockA financial instrument giving the holder a proportion of the ownership and earnings of a company. indexes advanced today: The Dow Jones Industrial Average, S&P 500 and NASDAQ gained 0.2%, 0.3% and 0.7%, respectively. In addition to the widely publicized Senate Judiciary Committee’s proceedings, the Securities and Exchange Commission also dominated headiness by with the formal filing of its much-anticipated lawsuit against Elon Musk. The SEC alleged that Musk made “false and misleading statements”; Tesla’s stock fell 13% in after-hours trading.