Information about SENAO’s outstanding stock options for the years ended December 31, 2009 and 2010 was  as follows:  As of December 31, 2009, information about SENAO’s outstanding and exercisable options was as follows:  As of December 31, 2010, information about SENAO’s outstanding and exercisable options was as follows:  No compensation cost was recognized under the intrinsic value method for the years ended December 31,  2008, 2009 and 2010. Had SENAO used the fair value method to recognize the compensation cost, there  were no significant impact on the consolidated net income and earnings per share.  Had SENAO used the fair value method to evaluate the options using the Black-Scholes model, the  assumptions of SENAO for the year ended December 31, 2010 would have been as follows:  F-42 Stock Options Outstanding 2009 2010 Number of  Options  (Thousands) Weighted  Average  Exercise Price NT$ Number of  Options  (Thousands) Weighted  Average  Exercise Price NT$ Options outstanding, beginning of year 13,818  $  26.34  9,323  $  30.92  Options exercised  (4,076) 13.75  (4,075) 23.40  Options expired  (419) 31.35  (145) 37.60  Options outstanding, end of year  9,323  30.92  5,103  36.15  Options exercisable, end of year  4,545  3,719  Options Outstanding Options Exercisable Range of Exercise Price (NT$) Number of Options (Thousand) Weighted- average Remaining  Contractual Life (Years) Weighted Average Exercise Price (NT$) Number of Options (Thousand) Weighted Average Exercise Price (NT$) $10.0-$13.3 3,427  2.20  $  12.96  1,512  $  12.54  $14.4-$17.6 259  1.92  14.40  259  14.40  $42.6 5,637  3.92  42.60  2,774  42.60  9,323  3.23  30.92  4,545  30.99  Options Outstanding Options Exercisable  Range of Exercise Price (NT$) Number of Options  (Thousand) Weighted- average Remaining  Contractual Life (Years) Weighted Average Exercise Price (NT$) Number of Options (Thousand) Weighted Average Exercise Price (NT$) $ 12.4 1,061  1.33 $  12.40 1,061 $  12.40 $ 13.5 30  0.92 13.50 30  13.50 $ 42.6 4,012  2.92 42.60 2,628 42.60 5,103  2.58 36.15 3,719 33.75 March 4, 2004 December 28,  2004 November 28,  2005 May 5, 2006 October 31,  2007 Expected dividend yield — — — — 1.49% Risk free interest rate 1.88% 1.88% 2.00% 1.75% 2.00% Expected life  4.375 years   4.375 years   4.375 years   4.375 years   4.375 years Expected volatility 52.65% 49.88% 43.40% 39.63% 39.82% Weighted-average fair  value ofgrants $  10.56  $  4.91  $  6.93  $  5.88  $  13.69 