#US: Noon: Dow extended gains after opening; markets mixed. JPMorgan reported better than expected earning. Delta Air stock fell after it said it would take at least 2 yrs to recover. US called China's claim in South China Sea as illegal. #DJIA +0.88% #NASDAQ -0.45% #SP500 +0.17% https://t.co/3UxkFP2eSi