Page 137 - China Mobile Limited - Annual Report 2012

China Mobile Limited
Annual Report 2012
131
Notes to the Financial Statements
(Expressed in Renminbi unless otherwise indicated)
35 Equity Settled Share-Based Transactions (Continued)
(b) The number and weighted average exercise prices of share options are as follows:
The Group
2012 2011
Weighted
average
exercise price
Number of
shares
involved in
the options
Weighted
average
exercise price
Number of
shares
involved in
the options
HK$ HK$
As at 1 January 30.68 416,363,148 30.59 423,005,473
Exercised 23.09 (28,275,029) 24.72 (6,642,325)
Expired 22.85 (276,770) – –
As at 31 December 31.24 387,811,349 30.68 416,363,148
Option vested as at 31 December 31.24 387,811,349 30.68 416,363,148
The weighted average share price at the date of exercise for shares options exercised during the year was
HK$83.35 (2011: HK$75.45).
The options outstanding as at 31 December 2012 had exercise prices ranging from HK$22.75 to HK$34.87 (2011:
HK$22.75 to HK$34.87) and a weighted average remaining contractual life of 2.5 years (2011: 3.4 years).
The fair value of services received in return for share options granted are measured by reference to the fair value
of share options granted. The estimate of the fair value of the share options granted is measured based on a
binomial lattice model. The contractual life of the option is used as an input into this model. Expectations of early
exercise are incorporated into the binomial lattice model. No share options were granted during 2011 and 2012.