Wall St rallies on earnings optimism

By Chuck Mikolajczak NEW YORK (Reuters) - Wall Street rallied on Tuesday in the wake of a host of solid earnings reports that put corporate profits on track to snap a four-quarter streak of declines. Of the 52 S&P 500 companies that have reported results to date for the third quarter, 81 percent have reported earnings that topped average analyst estimates, according to Thomson Reuters I/B/E/S. Third-quarter earnings are now expected to show growth of 0.2 percent, which would mark an end to t