向下波動時,期權價值=0=HSd-B,Su=6.35*1.05=6.6675,Sd=6.35*0.95=6.0325。
h = 0.2675/(6.6675-6.0325)= 0.4213,PV(B)= 6.0325 * 0.4213/1.01 = 2.5163
c = 6.35 * 0.4213-2.5163 = 0.159