Credit cards issued directly by Discover Financial Services (DFS) generated $115.52 billion in purchases at merchants in 2014, up 5.1% over 2013. Balance transfers and cash advances at $9.59 billion grew 11.1% from the prior year. Combined purchase and cash volume of $125.11 billion grew 5.5%. Cash accounted for 7.67% of total volume last year compared to 7.29% in 2013. Credit card outstandings owned by DFS reached $56.13 billion, up 5.6% or $2.98 billion. The net principal charge-off rate of 2.27% was up 6 basis points from the prior year. The amount of net principal charge-offs grew 8.3% ...