My first Publication ocbc_ar17_fullreport_english | Page 187

13. SHARE CAPITAL AND OTHER EQUITY (continued) 13.2 SHARE OPTION SCHEME During the year, the Bank granted 9,587,008 (2016: 9,524,094) options to acquire ordinary shares in the Bank pursuant to OCBC Share Option Scheme 2001. This included 772,350 (2016: 1,024,798) options granted to a director of the Bank. The fair value of options granted, determined using the binomial valuation model, was $7.3 million (2016: $12.4 million). Significant inputs to the valuation model are set out below: Acquisition price ($) Share price ($) Expected volatility based on last 250 days historical volatility as of acceptance date (%) Risk-free rate based on SGS bond yield at acceptance date (%) Expected dividend yield (%) Exercise multiple (times) Option life (years) 2017 2016 9.60 – 12.32 9.64 – 12.39 12.94 – 14.73 2.11 3.22 – 4.27 1.74 10 8.81 8.95 20.08 1.83 4.02 1.78 10 Movements in the number of options and the average acquisition prices are as follows: 2017 Number of options At 1 January Granted and accepted Exercised Forfeited/lapsed At 31 December Exercisable options at 31 December Average share price underlying the options exercised 2016 Average price Number of options Average price 40,887,286 9,587,008 (13,224,648) (664,684) 36,584,962 $9.116 $9.603 $8.860 $9.825 $9.323 34,806,479 9,479,487 (1,544,200) (1,854,480) 40,887,286 $9.109 $8.814 $6.739 $9.411 $9.116 18,796,148 $9.225 $10.712 25,188,639 $8.996 $8.690 At 31 December 2017, the weighted average remaining contractual life of outstanding share options was 7.0 years (2016: 6.4 years). The aggregate outstanding number of options held by directors of the Bank was 4,624,417 (2016: 4,366,217). BUILDING ON OUR CORPORATE STRATEGY FOR SUSTAINABLE GROWTH 185