Changes in accumulated other comprehensive income (loss) attributable to NL stockholders, including amounts resulting from our investment in Kronos Worldwide (see Note 5), are presented in the table below.

	Three months ended						Six months ended
	June 30,						June 30,
	2018			2019			2018			2019
	(In thousands)
Accumulated other comprehensive loss, net of tax:
Currency translation:
Balance at beginning of period	$	(161,876	)	$	(172,459	)	$	(164,467	)	$	(172,434	)
Other comprehensive income (loss)		(6,108	)		1,720			(3,517	)		1,695

Balance at end of period	$	(167,984	)	$	(170,739	)	$	(167,984	)	$	(170,739	)

Defined benefit pension plans:
Balance at beginning of period	$	(71,968	)	$	(74,458	)	$	(72,951	)	$	(75,286	)
Other comprehensive income - amortization of net losses included in net periodic pension cost		974			817			1,957			1,645

Balance at end of period	$	(70,994	)	$	(73,641	)	$	(70,994	)	$	(73,641	)

OPEB plans:
Balance at beginning of period	$	(461	)	$	(620	)	$	(388	)	$	(550	)
Other comprehensive loss - amortization of net gains included in net periodic OPEB cost		(65	)		(65	)		(138	)		(135	)

Balance at end of period	$	(526	)	$	(685	)	$	(526	)	$	(685	)

Marketable securities:
Balance at beginning of period	$	-		$	-		$	46,069		$	-
Change in accounting principle		-			-			(46,069	)		-

Balance at end of period	$	-		$	-		$	-		$	-

Total accumulated other comprehensive loss:
Balance at beginning of period	$	(234,305	)	$	(247,537	)	$	(191,737	)	$	(248,270	)
Change in accounting principle		-			-			(46,069	)		-
Balance at beginning of period, as adjusted		(234,305	)		(247,537	)		(237,806	)		(248,270	)
Other comprehensive income (loss)		(5,199	)		2,472			(1,698	)		3,205

Balance at end of period	$	(239,504	)	$	(245,065	)	$	(239,504	)	$	(245,065	)