Investors breathed a sigh of relief after U.S. midterm elections.

Some of them said there is a chance a Democrat-controlled House will hamper President Donald Trump's pro-business agenda, including a second tax cut.

But, on the other hand, Republicans didn't do as bad as they could have.

And that was enough to buy back into a market that had its worst month in seven years in October.

FTSE Russell managing director Alec Young: (SOUNDBITE) (English) FTSE RUSSELL, GLOBAL MARKETS RESEARCH, MANAGING DIRECTOR, ALEC YOUNG, SAYING: "Not surprised to see a positive tone in the markets today after the election.

And, I think, another positive force that people should think about is the idea that, now that the president has lost the majority in the House of Representatives, it may be a little bit more difficult for him to push through stimulative legislation, now that he doesn't have control of both houses of Congress, so he may be more inclined to compromise and do a Chinese trade deal, which, obviously, is a big macroeconomic focus for markets." The technology and healthcare sectors rose.

Investors bet that a gridlocked Congress will not be able to push through restrictive regulations, a fear that has weighed on the growth of both sectors.