America's biggest bank, JPMorgan Chase & Co, has suffered a 6.4 per cent fall in revenue in the September quarter, Bloomberg reports. The fall was due to weaker trading conditions, particularly fixed income trading, and subdued mortgage market activity. The bank's net income rose but this was largely due to the use of tax credits dating back to the financial crisis. Bank of America has reported net income of US$4.5 billion for the third quarter of 2015, compared to a net loss of $232 million for the comparable period in 2014. Back then, earnings were severely impacted by a multibillion-dollar settlement with the US government over mortgages. Group revenue across its five business divisions fell slightly to US$20.7 billion (down from $21.4 billion a year ago). BofA, which has paid more than $70 billion in legal fees since 2008, said those costs fell for the third straight quarter, dropping to $231 million from $6 billion a year earlier, reported CNBC and Reuters. Wells Fargo has delivered third-quarter earnings that topped analysts' expectations. The fourth-biggest US bank by assets, and the nation's biggest mortgage lender, posted third-quarter earnings of US$5.44 billion in the third quarter of 2015, barely up from earnings a year earlier. The result was in line with Wall Street analysts' estimates, CNBC reported.