EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2011

16. EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted gain (loss) per share for the periods indicated:

	Years Ended December 31,

	2009		2010		2011
	$		$		$
Net income (loss) attributable to Canadian Solar Inc.—basic and diluted	$	22,645,884	$	50, 568,919	$	(90,804,200	)

Weighted average number of common shares—basic		37,137,004		42,839,356		43,076,489
Diluted share number from share options and restricted shares		590,134		838,852		—

Weighted average number of common shares—diluted		37,727,138		43,678,208		43,076,489

Basic earnings (loss) per share	$	0.61	$	1.18	$	(2.11	)

Diluted earnings (loss) per share	$	0.60	$	1.16	$	(2.11	)

The following table sets forth anti-dilutive shares excluded from the computation of diluted earnings (loss) per share for the periods indicated.

	Years Ended December 31,

	2009		2010		2011
Convertible notes		50,607		50,607		50,607
Share options and restricted shares		597,842		426,716		1,871,147

		648,449		477,323		1,921,754

The entire disclosure for earnings per share.