American Express, Bank of America, Capital One, Citigroup, Discover Financial, JPMorgan Chase, Synchrony Financial and U.S. Bancorp were the most profitable payment card companies in the United States last year. They earned a combined $19.16 billion in pretax net income from their card businesses. However, that amount was a decline of 45.9% from 2019. Those companies set aside a combined $58.82 billion for anticipated card loan losses as of year-end 2020, an increase of 86.4% from 2019. American Express remained the most profitable U.S.-based company in this group in 2020 based on its globa...