The Dow Jones Industrial Average traded above 20,000 for the first time and world stocks hit 19-month highs on strong Japanese trade data, stellar European corporate results and investor enthusiasm over US President Donald Trump.
The president's signing of numerous executive orders since his inauguration on Friday reignited a rally that began after his election victory in November. Trump marked the milestone with a tweet: "Great!#Dow20K."
Investors said crossing the 20,000 mark was just a number, but still nice to have.
"While the Dow hitting 20,000 is one of the least meaningful data points on my screen, it does suggest that the equity rally is pretty broad-based," said Michael Purves, chief global strategist at Weeden & Co in New York.
Brian Jacobsen, chief portfolio strategist at Wells Fargo Asset Management in Menomonee Falls, Wisconsin said the moment was "like watching your odometer cross over 100,000 or peeking up at the clock and noticing that it's exactly noon.
"There are no magic numbers but we like to pretend that there are," Jacobsen said.
The iconic Dow index came within a point of the historic 20,000 level on January 6 as investors banked on pro-growth policies and tax cuts from the new Trump administration.
The renewed focus on Trump's policies to reflate the U.S. economy didn't extend as much to bond and currency markets, where U.S. yields only inched up and the dollar fell across the board, particularly against a resurgent British pound.
MSCI's global share index rose 0.67pc to 435.61 points , its highest since June 2015.
The Dow Jones Industrial Average rose 141.33 points, or 0.71pc, to 20,054.04, the S&P 500 gained 14.22 points, or 0.62pc, to 2,294.29 and the Nasdaq Composite added 41.94 points, or 0.75pc, to 5,642.90.
The post-election rally on Wall Street had tempered in recent days as investors focused on the White House's trade protection pronouncements.
The stock move since November 22, when the Dow first closed above 19,000, has been spearheaded by financial stocks - with Goldman Sachs and JPMorgan together accounting for about 20pc of the gain.
The two banks have benefited as investors bet Trump's expected fiscal stimulus will trigger inflation and stoke a rise in interest rates.
In Europe, In Europe, the FTSEurofirst 300 index of leading regional shares rose 1.3pc and Germany's DAX rose 1.89pc to a fresh 18-month high, while France's CAC 40 Index rose 1.17pc.
Earlier in Japan, the Nikkei advanced 1.4pc, buoyed by data showing the country's exports rose for the first time in 15 months in December, a positive sign for the economy even as talk of U.S. protectionism looms over the outlook.
Trump signed two executive orders on Tuesday to move forward with construction of the Keystone XL and Dakota Access oil pipelines, rolling back key Obama administration environmental actions in favor of expanding energy infrastructure.
He also met chief executives of the Big Three U.S. automakers to push for more cars to be built in the United States.
Global bond yields rose as Trump shifted his focus back to growth initiatives including promising corporate tax breaks to fuel U.S. investment, after focusing on protectionism in his first few days in office.
The yield on the benchmark 10-year U.S. Treasury rose to 2.505pc, with prices falling 8/32.
European yields rose further. Germany's 10-year Bund yield hit a six-week high of 0.389pc and France's benchmark 10-year yield hit a one-year high of 0.95pc. Bond prices were weighed down by the rally in stocks and new debt supply.
In currencies, the dollar failed to carry on its upward momentum from Tuesday.
Lingering concerns about growing protectionism and the potential negative effects on global trade and growth remained close to the surface. In this environment, the outlook for the Federal Reserve is murky.
The dollar fell 0.09pc to 113.68 yen, and 0.22pc against a basket of currencies. The euro was up at $1.0734, shrugging off a surprised fall in German business morale this month.
Oil prices reversed their overnight gains. Brent futures dipped 0.7pc to $55.05 per barrel, after rising 0.4pc overnight.