什么时候用e折线 什么时候用普通的折现？

NO.PZ2023020101000005问题如下 RyParisi is a managing rector in therivatives group High Rie Partners, investment management firm. Parisispecializes in aising institutionclients on the use of forwarcontractsin their portfolio management strategies. Parisi is preparing a response toquestions from one of the firm’s US-baseclients: Leslie Shero. To Curry,intern in the rivatives group, will assist Parisi.Leslie Shero oversees both equity anixeincome portfolios for a pension fun One month (30 ys) ago, Sherohincateththe pension funexpectea large inflow of cash in 60 ys.In orr to hee against a potentirise in equity values over this perioParisi aiseShero to enter into a long forwarcontraon the U300Inx expiring in 60 ys.Prior to the meeting, Parisi shows thespot priof the U300 inx in Exhibit 1 to Curry anasks how the 30-y forwarriwill relate to the current level of the inx. Curry compares the spotinx to the forwarprice.Exhibit1: SelecteFinanciInformation for Shero MeetingAssuming a 360-y year,the value of Shero’s forwarcontraon the Uinx is closest to: A.US52.18B.US49.16C.US50.71 The30-y forwarpriis Ft(T) = S0e(rc–γ)T = 1450.82e(0.0392–0.025)(30/360)= 1,452.54.Vt(T) = PVt,T[Ft(T) – F0(T)] = e–0.0392(30/360)(1,452.54– 1,403.22) = 49.16 不是很读懂题目，尤其是题目所涉及的那个时间段。可以使用画图题目吗？

NO.PZ2023020101000005 问题如下 RyParisi is a managing rector in therivatives group High Rie Partners, investment management firm. Parisispecializes in aising institutionclients on the use of forwarcontractsin their portfolio management strategies. Parisi is preparing a response toquestions from one of the firm’s US-baseclients: Leslie Shero. To Curry,intern in the rivatives group, will assist Parisi.Leslie Shero oversees both equity anixeincome portfolios for a pension fun One month (30 ys) ago, Sherohincateththe pension funexpectea large inflow of cash in 60 ys.In orr to hee against a potentirise in equity values over this perioParisi aiseShero to enter into a long forwarcontraon the U300Inx expiring in 60 ys.Prior to the meeting, Parisi shows thespot priof the U300 inx in Exhibit 1 to Curry anasks how the 30-y forwarriwill relate to the current level of the inx. Curry compares the spotinx to the forwarprice.Exhibit1: SelecteFinanciInformation for Shero MeetingAssuming a 360-y year,the value of Shero’s forwarcontraon the Uinx is closest to: A.US52.18 B.US49.16 C.US50.71 The30-y forwarpriis Ft(T) = S0e(rc–γ)T = 1450.82e(0.0392–0.025)(30/360)= 1,452.54.Vt(T) = PVt,T[Ft(T) – F0(T)] = e–0.0392(30/360)(1,452.54– 1,403.22) = 49.16 题目说一个月前，两个月后有一笔金额需要hee；又说要用60的contract来hee，到期时间和折现计算时间，怎么看？

NO.PZ2023020101000005 问题如下 RyParisi is a managing rector in therivatives group High Rie Partners, investment management firm. Parisispecializes in aising institutionclients on the use of forwarcontractsin their portfolio management strategies. Parisi is preparing a response toquestions from one of the firm’s US-baseclients: Leslie Shero. To Curry,intern in the rivatives group, will assist Parisi.Leslie Shero oversees both equity anixeincome portfolios for a pension fun One month (30 ys) ago, Sherohincateththe pension funexpectea large inflow of cash in 60 ys.In orr to hee against a potentirise in equity values over this perioParisi aiseShero to enter into a long forwarcontraon the U300Inx expiring in 60 ys.Prior to the meeting, Parisi shows thespot priof the U300 inx in Exhibit 1 to Curry anasks how the 30-y forwarriwill relate to the current level of the inx. Curry compares the spotinx to the forwarprice.Exhibit1: SelecteFinanciInformation for Shero MeetingAssuming a 360-y year,the value of Shero’s forwarcontraon the Uinx is closest to: A.US52.18 B.US49.16 C.US50.71 The30-y forwarpriis Ft(T) = S0e(rc–γ)T = 1450.82e(0.0392–0.025)(30/360)= 1,452.54.Vt(T) = PVt,T[Ft(T) – F0(T)] = e–0.0392(30/360)(1,452.54– 1,403.22) = 49.16 这题什么条件可以用画图法，这个重新定价和画图在这题的那个条件是看出来的？

NO.PZ2023020101000005问题如下 RyParisi is a managing rector in therivatives group High Rie Partners, investment management firm. Parisispecializes in aising institutionclients on the use of forwarcontractsin their portfolio management strategies. Parisi is preparing a response toquestions from one of the firm’s US-baseclients: Leslie Shero. To Curry,intern in the rivatives group, will assist Parisi.Leslie Shero oversees both equity anixeincome portfolios for a pension fun One month (30 ys) ago, Sherohincateththe pension funexpectea large inflow of cash in 60 ys.In orr to hee against a potentirise in equity values over this perioParisi aiseShero to enter into a long forwarcontraon the U300Inx expiring in 60 ys.Prior to the meeting, Parisi shows thespot priof the U300 inx in Exhibit 1 to Curry anasks how the 30-y forwarriwill relate to the current level of the inx. Curry compares the spotinx to the forwarprice.Exhibit1: SelecteFinanciInformation for Shero MeetingAssuming a 360-y year,the value of Shero’s forwarcontraon the Uinx is closest to: A.US52.18B.US49.16C.US50.71 The30-y forwarpriis Ft(T) = S0e(rc–γ)T = 1450.82e(0.0392–0.025)(30/360)= 1,452.54.Vt(T) = PVt,T[Ft(T) – F0(T)] = e–0.0392(30/360)(1,452.54– 1,403.22) = 49.16 如题 这个知识点基础班视频哪里有？折现为什么用e？