On Friday, JPMorgan Chase & Co. starts the earnings season for the third quarter. Dealbook, The New York Times blog, offered the following short preview of 3Q bank earnings:

JPMorgan Chase kicks off Wall Street’s third-quarter earnings season on Friday. Big United States banks have been struggling with a slump in trading and a slowdown in mortgage refinancing applications. As a result, many analysts have reduced their earnings estimates. For JPMorgan, its earnings report comes as the bank is engaged in negotiations with the Justice Department to resolve investigations into the bank’s crisis-era mortgage business. JPMorgan agreed last month to pay about $1 billion to settle investigations into a huge trading loss and its credit card practices. Another big bank, Wells Fargo, also reports quarterly results on Friday.