问题如下图：
选项：
A. 
B. 
C. 
解释：
老师您好，答案的解释和包包老师的解释完全没看懂，请问takes a short position in the TSI equity contract 怎么理解？是在T时间锁定价格卖出TSI股票吗？如何画图解决？怎么觉得解释和李老师讲的解体思路没有关系。谢谢。
NO.PZ201702190300000106 老师好 short equity forwar250.562289 不是指我希望以后pri低于 250.562289 的时候 我就可以以 250.562289 的价格sell 掉TSI shares 吗？也就是说我是希望以后TSI 's share pri越低越好。 A 和B 不都是表示TSI share pri会op 嘛， 那不都是对我来说是gain 吗？ 谢谢。
NO.PZ201702190300000106 increase in the risk-free rate, all else equa crease in the market priof the forwarcontract, all else equal. B is correct. From the perspective of the long position, the forwarvalue is equto the present value of the fferenin forwarprices: Vt(T)= PVt,T[Ft(T)-F0(T)] where Ft(T) =FVt,T(St+θt-γt) All else equal, increase in the risk-free rate before contraexpiration woulcause the forwarprice, Ft(T), to increase. This increase in the forwarpriwoulcause the value of the TSI forwarcontract, from the perspective of the short, to crease. Therefore, increase in the risk-free rate woulleto a loss on the short position in the TSI forwarcontract.这道题答案为什么不选A，请用公式一下。
老师我不懂这句话All else equal, increase in the risk-free rate before contraexpiration woulcause the forwarprice, Ft(T), to increase.利率上升怎么会使得forwarprice也上升呢？
不选 C，是因为 Forwarpri已经锁定为 250.562289 了吗？这样不管 forwarpri如何降价，都和我是否亏损无关了
increase in the risk-free rate, all else equa crease in the market priof the forwarcontract, all else equal. B is correct. From the perspective of the long position, the forwarvalue is equto the present value of the fferenin forwarprices: Vt(T)= PVt,T[Ft(T)-F0(T)] where Ft(T) =FVt,T(St+θt-γt) All else equal, increase in the risk-free rate before contraexpiration woulcause the forwarprice, Ft(T), to increase. This increase in the forwarpriwoulcause the value of the TSI forwarcontract, from the perspective of the short, to crease. Therefore, increase in the risk-free rate woulleto a loss on the short position in the TSI forwarcontract.重新定价法中 long/short position 公式分子中 FPt与 FP0 谁减谁的顺序从逻辑上怎么理解？
