Q3 – Zoubowsky a) To build the binomial tree, compute u and d : And the risk neutral probability of an up movement: We also compute the value of q (the percentage of shares hold by debtholders if they decide to convert the convertible):
Q3 – Zoubowsky a) Build the binomial tree for the value of the company:
Q3 – Zoubowsky a) The value of the debt in 2009 is equal to: In 2009, in the up-up state, the bondholders will decide to convert as value of the stock they get if they convert is higher than the face value of the bond: In 2009, in the up-down state, they will not convert as:
Q3 – Zoubowsky b) We go back in time to find the value in 2008 and 2009 :
Q3 – Zoubowsky b) In 2008, they will decide to convert if the value of shares they get is higher than the expected value if they decide to wait: Hence the value in 2009, in the up case is: The computation for 2008 down and 2007 are similar.
Q3 – Zoubowsky c) To find the value of the callable convertible bond, we have to proceed sequentially. Firstly we determine if shareholders will call, then we determine the decision of the bondholder (convert or accept the call price)? The binomial tree is :
Q3 – Zoubowsky c) The shareholders decide to call if : In 2008 up state, the shareholder will decide to call as the value of the call price times the number of bonds is lower than the expected value for the bondholders. Once the bond is called, bond holders have the choice between accepting the call price or convert their shares, in 2008 up-state they decide to convert as:
Q3 – Zoubowsky c) & d) In 2008 down state, shareholders decide to call as: And bondholders decide not to convert as: Similar computations leads to the value in d) Mr Zoubowsky should to call in 2007.
Q4 – Freshwater Are you lucky? Year 1Year 2 Bond 006 cash-flows6106 node r1,H1,0503 node r1,H100,92 Bond 006 node r1,H106,92 node r1,L1,0250 node r1,L103,41 Bond 006 node r1,L109,41 Value in 0104,01 = 0,5x(106,92/1,04) + 0,5x(109,41/1,04) --> OK the tree generates a value for the on-the-run issue equal to its market price.
Q4 – Freshwater A)Option free bond value Year ,5 99,49 4,5 101,17 101,95 4, ,5
Q4 – Freshwater B)Callable bond value101 Year ,5 99,49 4,5 100,72 101,00 4, ,5
Q4 – Freshwater C) Value of the call option101,17 – 100,72 = 0,46 =Option free bond value - Callable bond value
Q4 – Freshwater D) Arbitrage free model --> the i rate tree is constructed so that the value produced by the model when applied to an on the run issue is equal to its market price. It is also said to be 'calibrated to the market'. E) Higher volatility --> higher option value --> lower callable bond value [Callable bond value = option-free bond value - call option value]