Wall Street stocks surged to new record highs last night on optimism over international trade talks and continued positive momentum from solid economic data and earnings.
The Dow Jones finished at 27,462, up 0.4% and about 105 points above the previous all-time high in July.
The broad-based S&P 500 also gained 0.4%, rising to 3,078, while the tech-rich Nasdaq Composite Index jumped 0.6% to end at 8,433.
Analysts cited remarks from US Commerce Secretary Wilbur Ross that "phase one" of the trade agreement between Beijing and Washington was on track and hinting that the US may not impose tariffs on car imports from Europe and Japan.
Alan Skrainka, chief investment officer at Cornerstone Wealth Management, said investors are heartened that the US and China have pulled back from threats of new additional tariffs.
"The idea that it was going to get worse and worse was what investors were most worried about," Skrainka said. "And that is off the table."
The records also followed a strong US employment report released last Friday and a large number of third-quarter earnings reports in recent weeks that bested analyst expectations.
Petroleum-linked shares had an especially positive session, with Dow members Exxon Mobil and Chevron and Halliburton all winning at least 3%.
But another Dow company, McDonald's, dropped 2.8% after the fast-food chain over the weekend ousted CEO Steve Easterbrook over a "consensual relationship" with an employee that violated company policy.
Meanwhile, Under Armour plunged 17.9% as it said the US Justice Department and Securities and Exchange Commission are investigating its accounting practices.
The company "continues to believe its accounting practices and related disclosures were appropriate," Under Armour said in a securities filing.
Part of the reason for the big drop was that Under Armour did not previously disclose the probe, which began in 2017, analysts said.