US STOCKS-Wall St notches fourth straight advance as energy gains
* Oil prices rebound after early tumble
* Twitter retreats after buyout report said to be fake
* JPMorgan profit beats estimates; Wells Fargo revenue misses
* Indexes up: Dow 0.42 pct, S&P 0.45 pct, Nasdaq 0.66 pct (Updates to market close, changes byline)
By Chuck Mikolajczak
July 14 (Reuters) - Wall Street gained for a fourth straight session on Tuesday, its longest winning streak since January, buoyed by the energy sector as oil prices rebounded from early declines.
Oil prices were initially lower on concerns a deal between Iran and six global powers would result in more supply, but turned higher after it became apparent sanctions on Tehran's crude exports would not be removed immediately.
"The big news is clearly in the oil markets and the fact there was an agreement reached," said David Lefkowitz, senior equity strategist at UBS Wealth Management Americas in New York.
"There is still, frankly, a lot of uncertainty about exactly what it will do in terms of oil supply." Continuación...