 Shares of Discover Financial Services DFS, -2.91 on Wednesday slid in after-hours trade, after the banking and credit-card provider reported fourth-quarter results that beat expectations but also signs consumers were falling behind on payments. The company reported fourth-quarter net income of 1.03 billion, or 3.77 a share, compared with 1.07 billion, or 3.64 a share, in the same quarter last year. 