At least five new hedge fund companies are on track to start with at least $1 billion this year, according to data compiled by Bloomberg, after eight firms started with a 10-figure sum last year. Frustrated with the mediocre performance of some of the industry’s old guard, investors hoping for higher returns are writing checks to a handful of new funds, including one run by Brevan Howard Asset Management veteran Chris Rokos and another headed by ex-Elliott Management Corp. star Didric Cederholm.