9. Other Income

The components of other income for the three months and six months ended June 30, 2018 and 2017 were:



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(in millions)
Market data fees1	$	11	$	9	$	22	$	18
Minimum activity fees1		5		5		10		10
Risk exposure fees1		7		6		15		11
Payments for order flow1		5		4		10		8
Gains on financial instruments, at fair value and other investments, net		9		—		11		2
Gains (losses) from currency diversification strategy, net		(21)		29		17		78
Other, net		7		6		15		8
	$	23	$	59	$	100	$	135

(1)

See Note 8 for description of these revenues.

Gains on financial instruments, at fair value and other investments, net include (1) realized and unrealized gains and losses on financial instruments that (a) are held for purposes other than the Company’s market making activities, (b) are subject to restrictions, or (c) are accounted for under the equity method and (2) dividends on investments accounted at cost less impairment.