Cognizant Technology said on Tuesday its board has approved a $2 billion increase to the IT consulting company's current share repurchase plan, as it sharpens focus on bolstering shareholder returns. With this, the total amount authorized under the program is $3.1 billion. The company said it expects to buy back shares worth $1.1 billion this year, an increase of $500 million over its prior expectation. Shares of Cognizant, which is scheduled to host its investor day later on Tuesday, rose 1.7