Twitter stock rose today up nine percent. On Friday, interim CEO Jack Dorsey seems to have bought $875,000 worth of Twitter stock. In addition to Dorsey, chief financial officer Anthony Noto and board memberPeter Currie also purchased blocks of stock worth roughly $248,400 and $200,000 respectively. All three stock purchases were meant to show that Twitter’s leadership continues to have faith in the company. Investors looked on the move favorably, pushing the stock upward.