U.S. stock indices showed a decline amid disappointing investors on Twitter, Exxon and Intel (NASDAQ:INTC) quarterly results. However, the Dow Jones Industrial Average and Standard & Poor's 500 rose for the fourth time in a row this week, which is the longest rally since January. In five sessions, the Dow Jones added 1.6%, the S&P500 0.6% and the Nasdaq dropped 1.1%.