The Dow moved higher on gains in shares of UnitedHealth and those of JPMorgan Chase, up 1.9 per cent and 1.4 per cent respectively.
Both JPMorgan as well as shares of Wells Fargo rose, last up 0.9 per cent, after the banks reported their latest earnings. JPMorgan's profit exceeded expectations as the largest US bank cut costs.
"We're starting to see the efficiency gains come through," Jeff Harte, an analyst at Sandler O'Neill & Partners, told Bloomberg before results were released. "Big banks have scale that we really haven't seen the advantage of because of litigation and regulatory expense."
Shares of Micron Technology climbed 11.9 per cent amid reports of a US$23 billion buyout by Chinese state-owned semiconductor chip designer Tsinghua Unigroup.
In Europe, the Stoxx 600 Index ended the day with a 0.5 per cent increase from the previous close. The UK's FTSE 100 Index added 0.2 per cent, while Germany's DAX increased 0.3 per cent.
Greece is gearing up for today's parliamentary vote on a euro-zone bailout, its third, secured on Monday. Adding more intrigue to the outlook for Greece, a leaked report penned by the International Monetary Fund said the nation's creditors would either need to grant Greece a three-decade debt payment grace period or accept a deep haircut on current loans.
In Germany, the ZEW Center for European Economic Research said its index of investor and analyst expectations fell less than expected, declining to 29.7 in July from 31.5 in June.
"The macroeconomic picture for the German economy does not look bad at all," Carsten Brzeski, chief economist at ING DiBa in Frankfurt, told Bloomberg. "German investors have taken the stance that the Greek crisis or even a Grexit would not harm the German economy."
Oil rose, rebounding from earlier losses, after a landmark deal was reached between Iran and six world powers to curb the nation's nuclear program in return for ending sanctions.