U.S. stocks extended their rally Monday following a Wall Street Journal report that suggested Tehran was looking to resume talks with the White House over its nuclear program in order to de-escalate its military conflict with Israel.

Tehran is undecided on whether it will attend the next round of negotiations with the U.S., an Iranian Foreign Ministry spokesman said in state media. U.S. and Iranian officials were expected to meet for a sixth round of talks in Oman Sunday.