6. Earnings per Common Share

The reconciliation of the amounts used in the basic and diluted earnings per common share computations follows (in millions, except per share amounts):


	Three months ended June 30,
	2011			2010
	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount

Basic earnings per common share	$755	1,568	$0.48	$913	1,558	$0.59

Effect of dilutive securities:
Stock options and other dilutive securities		23			23

Diluted earnings per common share	$755	1,591	$0.47	$913	1,581	$0.58


	Six months ended June 30,
	2011			2010
	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount

Basic earnings per common share	$1,503	1,566	$0.96	$1,729	1,557	$1.11

Effect of dilutive securities:
Stock options and other dilutive securities		24			23

Diluted earnings per common share	$1,503	1,590	$0.95	$1,729	1,580	$1.09

The following potential common shares were excluded from the calculation of diluted earnings per common share because their inclusion would have been anti-dilutive (in millions):


	Three months ended June 30,		Six months ended June 30,
	2011	2010	2011	2010
Stock options and other dilutive securities excluded from the calculation of diluted earnings per common share	26	42	48	46