Traders will be focused on several key metrics as major US banks report earnings. Net interest income, loan loss provisions and credit quality, investment banking and trading revenue, and consumer resilience are among them. Traders will be closely monitoring net interest income or NII, which is the difference between what banks earn on loans and pay on deposits.NI has been declining since early 2023. A shift in the trend could have an impact. Loan loss provisions and credit quality will also be in focus.Cre ...