After 164 sessions without a record close, the Dow Jones Industrial Average on Thursday closed at a record high of 26,656.98, eclipsing its previous record set on January 26.
Tech stocks led all three major US indexes higher in a broad-based rally as trade worries subsided.
The Nasdaq also closed higher on Thursday, rising just less than 1% to close above 8,000, but short of a record close.
The Dow climbed 251 points, or 1 percent, to 26,656.
The technology sector.SPLRCT edged 0.1 percent lower, pulled down by a 1.3 percent decline in Microsoft (MSFT.O). The Nasdaq climbed 77 points, or 1 percent, to 8,027.
Markets have been pressured at times by those conflicts but investors took heart this week that the latest U.S. and China's trade tariff announcements on each other were not as severe as they could have been.
Volume on US exchanges was 6.52 billion shares, compared to the 6.23 billion average over the last 20 trading days.
The fresh records came as Canada's top diplomat Chrystia Freeland was back in Washington for another day of trade talks, with Canadian representatives pushing back against pressure from the Trump administration for a speedy deal.
Stocks are at record highs.
The U.S. Labor Department reported new claims for unemployment benefits fell last week to a near-49-year low, confirming a strong labor market a week before the U.S. Federal Reserve is expected to raise interest rates.
"The sharp rise in the 10-year that you've seen in the last few days and the widening of the yield curve, that has really built the fire under these financials", said Bucky Hellwig, senior vice president at BB&T Wealth Management in Birmingham, Alabama. Higher rates typically benefit the financial sector, which was up 1.0 percent.
The S&P 500 rose 22 points, or 0.8 percent, to 2,930.
Of the 11 major sectors of the S&P 500, seven ended in negative territory. The remaining members of the group were up, with Facebook Inc, Apple Inc, Amazon.com and Google parent Alphabet Inc, gaining between 0.8 and 1.5 percent.
Nike Inc rose 1.2 percent after an analysis of the company's online sales data by Thomson Reuters Proprietary Research revealed it had sold out of 61 percent more merchandise since the appearance the ad campaign featuring National Football League player Colin Kaepernick.
Bond prices fell. The yield on the 10-year Treasury rose to 3.09 percent.
General Electric Co slipped 2.9 percent after reporting a problem in its newest line of natural gas-fired turbines, prompting J.P. Morgan to lower its price target.
Declining issues outnumbered advancing ones on the NYSE by a 1.17-to-1 ratio; on Nasdaq, a 1.17-to-1 ratio favored decliners.