A raft of merger and acquisition activity in the global drug sector helped underpin equities on both sides of the Atlantic, as did better-than-expected earnings from companies including Netflix and Travelers.
Shares of Allergan soared, last up 15.3 per cent, after Canada's Valeant Pharmaceuticals offered to buy the company in a deal worth some US$46 billion. Separately, Novartis, GlaxoSmithKline, and Eli Lilly also announced deals.
"The Novartis-Glaxo deal and rumours about a potential AstraZeneca acquisition by Pfizer are giving the pharma sector a decent run," Witold Bahrke, a senior strategist at PFA Asset Management in Copenhagen, told Bloomberg News. "It's also fuelling further M&A expectations, which is helping equities today. The yo-yo market is set to continue, with ups and downs amid continued geopolitical uncertainty."
In afternoon trading in New York, the Dow Jones Industrial Average advanced 0.62 per cent, the Standard & Poor's 500 Index added 0.68 percent, while the Nasdaq Composite Index climbed 1.18 per cent.
Gains in shares of Home Depot and JPMorgan Chase, up 2.4 per cent and 1.8 per cent respectively, led the Dow higher.