US stock market opened, Dow Jones fell 0.06%, S&P 500 rose 0.09%, Nasdaq rose 0.32%. Warner Bros. Discovery (WBD.O) rose 5.6%, Paramount made a $30 per share acquisition offer. Rivian (RIVN.O) fell 2.5%, Tesla (TSLA.O) fell 1.7%, Morgan Stanley downgraded the ratings of the two companies.