Wall Street climbs on earnings improvement

By Chuck Mikolajczak NEW YORK (Reuters) - Wall Street advanced on Tuesday to give the S&P 500 its best day this month on the heels of solid earnings reports from names such as UnitedHealth and Netflix 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 e