8.1.1全部或无期权的风险度量 FIGURE 8-3:Numerical approximation for the delta of a put option. anJeA uondO -OV(S+)-Ov(S) (S+)-(S-) OV(S+)-OV(S-0) OV(S-6) 20 OV(S+9) S-6 S S+中 Asset price8.1.1 全部或无期权的风险度量