Jack Dorsey’s Twitter, Square Are Both on the Verge of Doubling This Year

In 2018, it pays to be on Jack Dorsey’s side. Square Inc. and Twitter Inc., which both count the tech titan as chief executive officer, are on the brink of boasting 100 percent gains this year. Square rose as much as 4.6 percent to $68.97 on Wednesday while Twitter gained more than 4 percent to $46.92.