Nasdaq hits record, S&P and Dow close in as banks gain

The Nasdaq hit a record intraday high on Tuesday, extending its bullish run as healthcare stocks rose for the sixth straight session, while a jump in banks boost the S&P 500 and the Dow. America Express and Caterpillar , both up more than 2 percent, led the 21 gainers among the 30 Dow components and set the blue-chip index back on course for the elusive 20,000-points mark. Investors are looking to the upcoming corporate earnings season to justify the record levels Wall Street has surged to i