Another record quarter for Apple is sending the Nasdaq composite index sharply higher at the opening of trading.
The Dow Jones industrial average and the Standard & Poor's 500 index also rose as other big corporate names like Boeing and Corning turned in strong earnings results of their own Wednesday.
The technology-focused Nasdaq jumped 53 points, or 1.8 percent, to 3,015 shortly after the opening bell. Apple soared 9 percent to $610 a share.
The Dow rose 71 points to 13,071, about half a percent. The S&P 500 rose 15 points, about one percent, to 1,387.
The dollar and US Treasury prices fell as investors moved money out of safe assets. - Sapa-AP