8. Earnings Per Share of Common Stock

The following is a reconciliation of the earnings and share data used in the basic and diluted (losses) earnings per share computations for the three and nine months ended September 30, 2017 and 2016:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
	($ in millions, except share amounts)
Net (losses) earnings available to Alleghany stockholders	$	(314.2)	$	155.8	$	(63.2)	$	387.4
Effect of dilutive securities		(8.9)		-		-		-

(Losses) Income available to common stockholders for diluted earnings per share	$	(323.1)	$	155.8	$	(63.2)	$	387.4


Weighted average common shares outstanding applicable to basic earnings per share		15,416,014		15,438,399		15,416,249		15,443,150
Effect of dilutive securities		42,310		-		-		6,330

Adjusted weighted average common shares outstanding applicable to diluted earnings per share		15,458,324		15,438,399		15,416,249		15,449,480

63,567 and 70,881 contingently issuable shares were potentially available during the first nine months of 2017 and 2016, respectively, but were not included in the diluted earnings per share computations because the impact was anti-dilutive to the earnings per share calculation.