problemset3 - Problem Set 3 Ec 136 Fall 2009 This problem set is due on September 24 Thursday in class Sorry no late problem sets are accepted All

Problem Set 3 Ec 136, Fall 2009 This problem set is due on September 24, Thursday, in class. Sorry, no late problem sets are accepted! All students must submit problem sets individu- ally. Please write your name, section time and GSI on the front page of your solution. 1. Dynamic trading In the coin toss economy in lecture 6, consider a call option with strike X = 0 : 2 and expiration in period 2, which is written on the number of heads. Formally, the payo/ of this option is max ( S ° X; 0) where S is the total number of heads ( 0 , 1 or 2 ) and X = 0 : 2 . Assume that the two securities traded in the economy are the Head and Tail assets discussed in class. (a) According to the LOOP, what is the price of this call option at date zero? (b) Use backward induction to construct a dynamic trading strategy that replicates the payo/ of the call option. (c) Suppose that the coins being tossed are replaced, and that the new coins are not fair, so that the probability of heads is now 3 = 5 . However, the prices and payo/s of the Head and Tail security are unchanged. Is the price of the call option a/ected? 2. Present value of car payments [based on 2006 Spring midterm] Montague Autos is o/ering interest-free credit on a new car that costs $11,250. The deal is that you pay down $750 and then $250 a month for the next 42 months. Capulet