Net income after taxes grew 30.6% to $2.74 billion at Discover Financial Services (DFS) in 2018 on revenues (net of interest expense) of $10.71 billion (up 8.2%). Purchases of goods and services tied to Discover brand credit and prepaid cards reached $139.04 billion, up 7.9% over 2017. Cash advances on Discover credit cards reached $13.80 billion, up 5.7%. Combined purchase and cash volume (total volume) reached $152.84 billion, up 7.7%. Cash volume accounted for 9.03% of total volume in 2018 versus 9.20% in 2017. Discover brand credit cards in circulation at December 31, 2018, rea...