STOCK OPTION AND STOCK UNIT PLANS (Tables)

12 Months Ended

Dec. 31, 2015

INCENTIVE STOCK OPTIONS

STOCK OPTION AND STOCK UNIT PLANS

Schedule of outstanding stock options

December 31, 2015	Number		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
(options in thousands; intrinsic value in millions ofCanadian dollars)
Options outstanding at beginning of year	31,330		34.97
Options granted	5,852		59.14
Options exercised1	(4,224	)	26.61
Options cancelled or expired	(170	)	44.87
Options outstanding at end of year	32,788		40.31	6.3	525
Options vested at end of year2	18,297		31.66	4.8	451

1	The total intrinsic value of ISO exercised during the year ended December 31, 2015 was $126 million (2014 - $117 million; 2013 - $98 million) and cash received on exercise was $43 million (2014 - $37 million; 2013 - $24 million).
2	The total fair value of options vested under the ISO Plan during the year ended December 31, 2015 was $34 million (2014 - $26 million; 2013 - $22 million).

Schedule of weighted average assumptions used to determine the fair value of stock options granted

Year ended December 31,	2015	2014	2013
Fair value per option (Canadian dollars)1	6.48	5.53	5.27
Valuation assumptions
Expected option term (years)2	5	5	5
Expected volatility3	19.9%	16.9%	17.4%
Expected dividend yield4	3.2%	2.9%	2.8%
Risk-free interest rate5	0.9%	1.6%	1.2%

1	Options granted to United States employees are based on New York Stock Exchange prices. The option value and assumptions shown are based on a weighted average of the United States and the Canadian options. The fair values per option were $6.22 (2014 - $5.45; 2013 - $5.15) for Canadian employees and US$6.16 (2014 - US$5.35; 2013 - US$5.63) for United States employees.
2	The expected option term is six years based on historical exercise practice and three years for retirement eligible employees.
3	Expected volatility is determined with reference to historic daily share price volatility and consideration of the implied volatility observable in call option values near the grant date.
4	The expected dividend yield is the current annual dividend at the grant date divided by the current stock price.
5	The risk-free interest rate is based on the Government of Canada’s Canadian Bond Yields and the United States Treasury Bond Yields.

PERFORMANCE STOCK OPTIONS

STOCK OPTION AND STOCK UNIT PLANS

Schedule of outstanding stock options

December 31, 2015	Number		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
(options in thousands; intrinsic value in millions ofCanadian dollars)
Options outstanding at beginning of year	4,511		35.97
Options granted	-		-
Options exercised1	(830	)	19.44
Options cancelled or expired	(464	)	39.34
Options outstanding at end of year	3,217		39.75	3.9	53
Options vested at end of year2	2,307		39.48	3.7	39

1	The total intrinsic value of PSO exercised during the year ended December 31, 2015 was $43 million (2014 - nil; 2013 - $62 million) and cash received on exercise was $13 million (2014 - nil; 2013 - $28 million).
2	The total fair value of options vested under the PSO Plan during the year ended December 31, 2015 was $6 million (2014 - $5 million; 2013 - nil).

Schedule of weighted average assumptions used to determine the fair value of stock options granted

Year ended December 31,		2014
Fair value per option (Canadian dollars)		5.77
Valuation assumptions
	Expected option term (years)1	6.5
	Expected volatility2	15.0%
	Expected dividend yield3	2.8%
	Risk-free interest rate4	1.7%

1	The expected option term is based on historical exercise practice.
2	Expected volatility is determined with reference to historic daily share price volatility.
3	The expected dividend yield is the current annual dividend at the grant date divided by the current stock price.
4	The risk-free interest rate is based on the Government of Canada’s Canadian Bond Yields.

PERFORMANCE STOCK UNITS

STOCK OPTION AND STOCK UNIT PLANS

Schedule of outstanding stock units

December 31, 2015	Number		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
(units in thousands; intrinsic value in millions of Canadian dollars)
Units outstanding at beginning of year	555
Units granted	244
Units cancelled	(9	)
Units matured1	(282	)
Dividend reinvestment	28
Units outstanding at end of year	536		1.5	47

1 The total amount paid during the year ended December 31, 2015 for PSU was $35 million (2014 - $36 million; 2013 - $48 million).

Restricted stock units

STOCK OPTION AND STOCK UNIT PLANS

Schedule of outstanding stock units

December 31, 2015	Number		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
(units in thousands; intrinsic value in millions of Canadian dollars)
Units outstanding at beginning of year	1,959
Units granted	854
Units cancelled	(101	)
Units matured1	(904	)
Dividend reinvestment	98
Units outstanding at end of year	1,906		1.4	88

1 The total amount paid during the year ended December 31, 2015 for RSU was $45 million (2014 - $45 million; 2013 - $41 million).