In Europe, the Stoxx 600 Index ended the session with a 2.3 per cent advance from the previous close, while Greece's ASE Index jumped 9 per cent. The UK's FTSE 100 Index gained 1.7 per cent, while both France's CAC 40 Index and Germany's DAX rallied 3.8 per cent.
"Now you're seeing the leaders of [euro zone] countries meeting to reach a deal and the hope that a deal is on the horizon is reflected in the rally today," Scott Brown, chief economist at Raymond James in St. Petersburg, Florida, told Reuters.
Gains in shares of Merck and those of Goldman Sachs, recently trading 1.5 per cent and 1.4 per cent higher respectively, led the Dow higher.
Also buoying the mood is rampant merger and acquisition activity.
Shares of Cigna rallied, last trading 5.6 per cent stronger, after it rejected a US$47 billion takeover offer from Anthem. And shares of Williams soared, last 24 per cent higher, after it rebuffed a US$48 billion buyout offer.
The latest US housing data also offered reason for optimism. A National Association of Realtors report showed existing home sales climbed 5.1 per cent to an annual rate of 5.35 million units, the highest level since November 2009.
"Solid sales gains were seen throughout the country in May as more homeowners listed their home for sale and therefore provided greater choices for buyers," Lawrence Yun, NAR chief economist, said in a statement.
"However, overall supply still remains tight, homes are selling fast and price growth in many markets continues to teeter at or near double-digit appreciation," Yun added. "Without solid gains in new home construction, prices will likely stay elevated - even with higher mortgage rates above 4 per cent."