Details of interest income and interest expense were as follows.



	Three months ended June 30,						Six months ended June 30,
(in millions)	2015			2014			2015			2014
Interest income
Loans	$	8,079		$	8,039		$	16,026		$	16,078
Taxable securities	1,608			1,940			3,332			3,840
Nontaxable securities^(a)	423			337			821			654
Total securities	2,031			2,277			4,153			4,494
Trading assets	1,736			1,827			3,470			3,598
Federal funds sold and securities purchased under resale agreements	340			398			736			834
Securities borrowed^(b)	(159		)	(131		)	(279		)	(219		)
Deposits with banks	312			279			653			535
Other assets^(c)	175			172			320			334
Total interest income	12,514			12,861			25,079			25,654
Interest expense
Interest-bearing deposits	308			417			672			843
Short-term and other liabilities^(d)	344			455			676			883
Long-term debt	1,068			1,086			2,162			2,253
Beneficial interests issued by consolidated VIEs	110			105			208			210
Total interest expense	1,830			2,063			3,718			4,189
Net interest income	10,684			10,798			21,361			21,465
Provision for credit losses	935			692			1,894			1,542
Net interest income after provision for credit losses	$	9,749		$	10,106		$	19,467		$	19,923


(a)	Represents securities which are tax-exempt for U.S. federal income tax purposes.


(b)	Negative interest income for the three and six months ended June 30, 2015 and 2014, is a result of increased client-driven demand for certain securities combined with the impact of low interest rates. This is matched book activity and the negative interest expense on the corresponding securities loaned is recognized in interest expense and reported within short-term and other liabilities.


(c)	Largely margin loans.


(d)	Includes brokerage customer payables.