(NEW YORK) -- The Dow Jones Industrial average closed up more than 600 points on Monday after President Donald Trump claimed "productive conversations" had been held between the United States and Iran.
The major stock indexes each soared more than 2% in early trading but gave up some of those gains as a flurry of headlines about the U.S.-Israeli war with Iran elicited price fluctuations.
The peace talks -- which Iranian officials denied -- sent the price of oil plunging on Monday on hopes that negotiations could reopen the Strait of Hormuz and end a weeks-long global energy shock.
The Dow closed up 631 points or 1.3%, while the S&P 500 jumped 1.1%. The tech-heavy Nasdaq increased 1.3%.
Each of the indexes remained below where it stood before the U.S.-Israeli war with Iran began on Feb. 28.
A selloff cascaded across global markets in recent weeks as stockholders feared economic fallout from a potentially prolonged bout of elevated oil prices.
Global oil prices plunged more than 10% on Monday after Trump made his claim about ongoing negotiations with Iran. Still, the price of oil stood above $100 a barrel, marking a steep rise since the outbreak of war.
Trump, after postponing U.S. strikes on Iran's energy infrastructure citing new negotiations with Tehran, said on Monday that talks will continue and that there are "major points of agreement."
According to Iranian state media, Iran's Parliament Speaker Mohammad Qalibaf said, "no talks with the U.S. have taken place; reports claiming otherwise are fake news aimed at influencing financial and oil markets and distracting from the challenges facing the U.S. and Israel."