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Investment / Financial Markets Old Exam MFE Forum 

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#1




Errata for Derivatives Markets (M/FE Textbook)
I thought it might be useful to provide links to the errata, and to create a thread where any of us can post mistakes we've found in either the first or second edition that are not listed on the errata page.
http://www.kellogg.northwestern.edu/...m/typos1e.html This is a sort of "master link" to all editions of the book. The link in the introduction to the textbook takes you here. I have contacted the author about something I noticed in chapter 12 that I think needs addressing and I will post again here when I receive a response. 
#2




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I noticed something on page 380 that I think is incorrect but is not listed on the errata page. When you discuss applying the BlackScholes formula to stocks with discrete dividends, I note that while you input the forward value into the BlackScholes formula, you don't adjust the volatility to reflect the difference between the stock price and the forward price, as you do in section 11.5, page 365. In Example 12.3, I checked the result, and indeed agree with your result if the volatility in the example is supposed to refer to the relative volatility of the forward, but I would get a different (higher) answer if I were to assume this was the stock volatility and adjust sigma in BS as well. Response: I agree with you that the discussion here (esp at the top of p. 381) should have included a discussion like that on p. 365. I've posted an erratum. 
#3




I emailed the author about these questions awhile back and haven't gotten an answer... Anyone else want to offer an opinion?
(1) Regarding equation 12.12 on page 394  while this is true for a call option, I believe that it would be false for a put option because the sign of the volatility must be positive, correct? (2) Regarding the application to the use of compound options to determine the value of an American call option (pp 455456), I believe that the discussion regarding "modified volatility" applies here as well? (3) Using compound option parity and regular putcall parity, it seems that one can derive a more intuitive expression for the value of an American call option as a European call option plus a putonput compound option with the same parameters as the callonput, correct? (4) At the bottom of page 657, you say that the correlation between dZ and dZ' is rho*dt. Should that instead be the covariance? 
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Last edited by Captain Nemo; 02122007 at 09:33 PM.. 
#6




Exercises 10.4, 10.6, 10.8: Conflicting information?
These exercises provide values for . Isn't the sole purpose of in this section to calculate u and d if they are not given? And doesn't the given value of conflict with the given values of u and d in these exercises?
Thanks in advance. And apologies in advance if I'm missing something, in which case I'll delete this subthread. 
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or does (CRR tree) or does (Lognormal tree or JarrowRudd binomial model)? 
#9




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The u and d in the questions do not correspond with the standard binomial model, the CRR model, or the JR model. The CRR model and the JR model aren't covered until Chapter 11 anyway, so we wouldn't expect them to appear in questions at the end of Chapter 10. For Problems 10.4, 10.6, and 10.8, the textbook uses what we could call the "arbitrary" method, meaning that someone just made up values for u and d. The arbitrary method is valid (and frequently appears on the exam!), but there isn't any used as an input to it, so including in the problems seems misleading to me. 
#10




I wouldn't say it's arbitrary. I listed three models, there are likely others and the author might even be able to provide support for them. I think what he's testing here is your ability to know to use u and when those are given. You call it misleading, I call it knowing what to use when

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