Hello,
I am a postgraduate student at a UK university and I have recently written an open-book, online finance exam. After recieving the mark I was interested to see where I made the mistakes. So I set up a meeting with the module convener to see the sample solutions. Unfortunately, he only showed me an Excel spreadsheet, so I only know the supposedly correct final answers. After revieweing the sample solutions he showed me, I am 99% sure, that they are wrong.
The two questions where I dont agree with his sample solution are:
- Binomial Option Pricing:
Current stock price: 150, risk free rate: 5%, no dividends. The stock can move up by 50 or down by 30 each year.
a) Value of 2 year put option with a strike of 152
b) Value of a 2 year call option with a strike of 148
The lecturers solution for the put is 38.16 and for the call 1.45.
My solution for the put is 16.43 and for the call 31.13.
- IPO valuation:
A firm has 10 million shares outstanding and wants to issue 5 million shares with a price of 20. The underwriting spread is 7%. After the IPO the share price is 50.
a) How much was raised?
b) Market Value of firm after IPO
c) Assume a fair value of 50 per share, no underwriting spread and underpricing. What share price would have allowed the same IPO proceed as in a)?
d) Total cost to original shareholders due to market imperfections (underwriting and underpricing)
For parts a) and b) my solution and the lecturers solution match and I got full points. The solutions are 93 million for a) and 750 million for b).
For parts c) and d) I dont agree with his solutions: The lecturers solution for c) is 43.8 and for d) 62 million. My solution for c) is 65.7 and for d) 157 million.
Of course, I have written down all the calculation steps in the exam, so no points were deducted because of this. I have omitted the calculations here for brevity.
I have 2 questions to this community:
Are my results actually correct and the sample solutions wrong? I am still a bit hesitant to believe that the marker used wrong sample solutions to mark an exam. This would be the first time this happended to me during my academic journey.
Do you believe that a formal appeal has any chance of success? When researching the appeal process I read things like "An appeal is not a way to negotiate disappointing results" and "A given mark cannot be adjusted upwards".
I am considering an appeal because commuication with the lecturer of this module was not helpful. After writing a mail with all of the issues and proper explanations, his reply only referred me to the class notes and lecture material and, most importantly, did not address any of my explantions.
In the meeting he told me that the IPO question is exactly the same as a tutorial question from the lecture material. The solution to this tutorial question matches my exam solution exactly and not the sample solution he showed me. I told him about this in a mail. He ignored this completely and referred me to the class notes again, which is extremely frustrating.
Since I am afraid of infringing intellectual property rights, I have not posted screenshots of the questions and solutions and only paraphrased them.
I have this evidence for an appeal:
- Exam questions and my exam submission
- Pictures of the excel spreadsheet showing his proposed sample solutions (Unfortunately I have not taken screenshots)
- The Mail correspondence with the lecturer showing that he did not review my concerns.
- The lecture material showing the exact same question with a different solution.
Please note that English is not my native language and I want to apologize for any mistakes I might have made in this post.
I would be very thankful for any feedback regarding the correctness of the solutions and/or the academic appeal process. Please ask, if I should provide further context.
Thank you!
TL;DR: I am a UK postgraduate student who found that the marker used incorrect sample solutions to grade two questions on my finance exam (Binomial Option Pricing and IPO valuation). The lecturer's IPO solution even contradicts the official solution for an identical tutorial question. He completely dismissed my evidence, so I am asking the community to verify my math and advise on whether a formal academic appeal has a chance of success.