# Term Structure Models II and Introduction to Credit Derivatives Calibration of term-structure…

Term Structure Models II and Introduction to Credit Derivatives Calibration of term-structure models; the Black-Derman-Toy and Ho-Lee models. Limitations of term-structure models and derivatives pricing models in general. Introduction to credit-default swaps (CDS) and the pricing of CDS and defaultable bonds. Model Calibration
An Application: Pricing a Payer Swaption in a BDT Model Instructions: Term Structure Models II and Introduction to Credit Derivatives – TermStructure_Binomial_#2 Fixed Income Derivatives Pricing in Practice Modeling Defaultable Bonds Pricing Defaultable Bonds Credit
»Term Structure Models II and Introduction to Credit Derivatives Calibration of term-structure models; the Black-Derman-Toy and Ho-Lee models. Limitations of term-structure models and derivatives pricing models in general. Introduction to credit-default swaps (CDS) and the pricing of CDS and defaultable bonds. Model Calibration
An Application: Pricing a Payer Swaption in a BDT Model Instructions: Term Structure Models II and Introduction to Credit Derivatives – TermStructure_Binomial_#2 Fixed Income Derivatives Pricing in Practice Modeling Defaultable Bonds Pricing Defaultable Bonds Credit Default Swaps Pricing Credit Default Swaps Interview with Emmanuel Derman Questions 1 and 2 should be answered by building and calibrating a 10-period Black-Derman-Toy model for the short-rate, ri,jr_{i,j}ri,j?. You may assume that the term-structure of interest rates observed in the market place is: Period 1 2 3 4 5 6 7 8 9 10 Spot Rate 3.0% 3.1% 3.2% 3.3% 3.4% 3.5% 3.55% 3.6% 3.65% 3.7% As in the video modules, these interest rates assume per-period compounding so that, for example, the market-price of a zero-coupon bond that matures in period 666 is Z06=100/(1+.035)6=81.35Z_0^6 = 100/(1+.035)^6 = 81.35Z06?=100/(1+.035)6=81.35 assuming a face value of 100._____________________________________________________________________ Questions 3-5 refer to the material on defaultable bonds and credit-default swaps (CDS). Question 1 Assumeb=0.05b=0.05b=0.05 is a constant for alliii in the BDT model as we assumed in the video lectures. Calibrate theaia_iai? parameters so that the model term-structure matches the market term-structure. Be sure that the final error returned by Solver is at most10-810^{-8}10-8. (This can be achieved by rerunning Solver multiple times if necessary, starting each time with the solution from the previous call to Solver. Once your model has been calibrated, compute the price of a payer swaption with notional \$1M that expires at timet=3t=3t=3 with an option strike of000. You may assume the underlying swap has a fixed rate of3.9%3.9%3.9% and that if the option is exercised then cash-flows take place at timest=4,…,10t=4, ldots , 10t=4,…,10. (The cash-flow at timet=it=it=i is based on the short-rate that prevailed in the previous period, i.e. the payments of the underlying swap are made in arrears.) Submission Guideline: Give your answer rounded to the nearest integer. For example, if you compute the answer to be 10,456.67, submit 10457. Question 2 Repeat the previous question but now assume a value ofb=0.1b = 0.1b=0.1. Submission Guideline: Give your answer rounded to the nearest integer. For example, if you compute the answer to be 10,456.67, submit 10457. Question 3 Construct a n=10n = 10n=10-period binomial model for the short-rate, ri,jr_{i,j}ri,j?. The lattice parameters are: r0,0=5%r_{0,0}= 5%r0,0?=5%, u=1.1u=1.1u=1.1, d=0.9d=0.9d=0.9 and q=1-q=1/2q=1-q=1/2q=1-q=1/2. This is the same lattice that you constructed in Assignment 5. Assume that the 1-step hazard rate in node (i,j)(i,j)(i,j) is given by hij=abj-i2h_{ij} = a b^{j-frac{i}{2}}hij?=abj-2i? where a=0.01a = 0.01a=0.01 and b=1.01b = 1.01b=1.01. Compute the price of a zero-coupon bond with face value F=100F = 100F=100 and recovery R=20%R = 20%R=20%. Submission Guideline: Give your answer rounded to two decimal places. For example, if you compute the answer to be 73.2367, submit 73.24. Question 4 The true price of 5 different defaultable coupon paying bonds with non-zero recovery are specified in worksheet Calibration{tt Calibration}Calibration in the workbookAssignment 5_cds.xlsx.{tt Assignment5_cds.xlsx}.Assignment5_cds.xlsx. The interest rate is r=5%r = 5%r=5% per annum. Calibrate the six month hazard rates A6{tt A6}A6 to A16{tt A16}A16 to by minimizing the Sum?Error{tt Sum ,Error}SumError ensuring that the term structure of hazard rates are non-decreasing. You can model the non-decreasing hazard rates by adding constraints of the form A6=A7,…,A15=A16{tt A6} leq {tt A7}, ldots, {tt A15} leq {tt A16}A6=A7,…,A15=A16. Report the hazard rate at time 000 as a percentage. Submission Guideline: Give your answer inpercent rounded to two decimal places. For example, if you compute the answer to be 73.2367%, submit 73.24. ?Question 5 Modify the data on the CDS?pricing{tt CDS ,pricing}CDSpricing worksheet in the workbookbonds_and_cds.xlsx{tt bonds_and_cds.xlsx}bonds_and_cds.xlsx to compute a par spread in basis points for a 5yr CDS with notional principalN=10N =10N=10 million assuming that the expected recovery rateR=25%R = 25%R=25%, the 3-month hazard rate is a flat1%1%1%, and the interest rate is5%5%5% per annum. Submission Guideline: Give your answer inbasis points rounded to two decimal places (1 bps = 0.01%). For example, if you compute the answer to be 73.2367 bps, submit 73.24.

Attachments:

calibration-c….xlsxBonds-and-cds….xlsx

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