At the close, the broad S&P 500 rose 0.3 percent, and the technology-heavy Nasdaq gained 0.4 percent, with both breaking records set on Wednesday.
Gains were also noticeable on the Dow Jones Industrial Average, up 0.2 percent.
Late Thursday afternoon, US President Donald Trump announced that Lebanon and Israel had agreed to a 10-day ceasefire. The announcement raised hopes that the US-Israeli war against Iran will soon be over, as an end to the fighting in Lebanon has been one of Tehran's demands in negotiations with Washington.
