    Sentence 1: U.S: corporate bond yield spreads  pened. tighter overall’ on Tuesday , but  tobacco company bonds widened significantly  after an adverse legal ruling on Philip: Morris  USA:    Sentence 2; U.S. corporate bond yield spreads.  ended . mostly. tighter : aiid . “slumping  Treasuries "on Tuesday ,~ while - borids- of  tobaced firms widened significantly after an  adverse legal ruling on Philip Morris USA..         