Shares of power producers rose amid deal activity.

NextEra Energy agreed to buy Dominion Energy in a roughly $67 billion deal that would create the largest U.S. electricity producer and represent one of the biggest tie-ups of the year.

"Any time there's a lot of activity and high-level growth [in a sector], you see more merger-and-acquisitions," said J.D. Joyce, president of Houston financial advisory Joyce Wealth Management.

Write to Rob Curran at rob.curran@dowjones.com

(END) Dow Jones Newswires