US STOCKS-S&P, Dow at record highs; Nasdaq turns positive for 2016
* Alcoa touches 5-month high on profit beat
* Oil price bounce boosts energy, materials stocks
* Airline stock up on UAL revenue forecast
* Indexes up: Dow 0.71 pct, S&P 0.80 pct, Nasdaq 0.81 pct (Updates to early afternoon)
By Yashaswini Swamynathan
July 12 (Reuters) - The S&P 500 and the Dow hit record intraday highs on Tuesday, while the Nasdaq turned positive for the first time this year, buoyed by rising prospects of global economic health and with Alcoa getting the U.S. earnings season off to a promising start.
The S&P 500 hit 2,155.32, breaking past its previous record on Monday. The Dow hit an all-time high of 18,360.51.
Alcoa's quarterly profit fell less than expected, sending the aluminum producer's shares to a five-month high of $10.67 and helping boost optimism about the earnings season.
Strong economic data and low returns on government bonds along with easing political tensions in Britain and Japan have reduced some global uncertainties and boosted investor appetite for equities. Continuación...