Shares of Signify Health Inc. sgny gained 0.4% in premarket trading Tuesday, after the home-health provider announced over the long weekend an agreement to be acquired by CVS Health Corp. CVX, +1.49% in a deal valued at about $8 billion. Under terms of the deal announced late Monday, CVS will pay $30.50 in cash for each Signify share outstanding, which is 6.0% above Friday's closing price of $28.77.