Despite a sharp increase in credit provisions amid the fallout from Covid-19, Wall Street's big banks maintained their capital strength in the second quarter, Moody's Investors Service says. The rating agency reported that the big five Wall Street firms — Bank of America Corp., Citigroup Inc., Goldman Sachs Group Inc., JPMorgan Chase & Co. and Morgan Stanley — generated aggregate pre-tax profits of $18.5 billion (all figures in U.S. dollars) in the second quarter, down 43% from the same quarter a year ago but up 29% from the first quarter of 2020.