Chris Rokos’s hedge fund rose about 20 percent in 2016, its first full year of trading, to become one of the world’s best-performing money pools betting on economic trends, according to people with knowledge of the matter. About half of the gain came in the fourth quarter, when Donald Trump’s surprise victory in the U.S. presidential election triggered sharp moves in bond yields and currency markets, said one of the people, who asked not to be identified because the information is private.