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Problem Sheet 3, 4CMP Spring Term 2019/20
PROBLEM SHEET 3
4CMP, SPRING TERM, PART 2: PROGRAMMING IN C++
Due Date: Saturday 22nd February 2020 at 11.59 pm
Weighting: This problem sheet counts 15% to your final mark for the spring part of 4CMP, but only
the best two out of problem sheets 1-3 count.
INSTRUCTIONS FOR THE SUBMISSION:
Submit your code by the deadline on Canvas. Each problem on this sheet should be implemented in
source code files that are named as follows: Each program contains a main_X.cpp. Here, X is the
number of the problem. For example, main_P1.cpp. Likewise, additional files should be tagged with
the problem number. For instance, if you would add a class Person in Problem 1, implement the
code in two files labelled: Person_P1.h and Person_P1.cpp.
This file should compile without errors or warnings on Visual Studio 2017 as installed on the clusters
in the learning centre, and the executable should run without problems.
Marking: The most important criteria for marking is the correctness of the code. It needs to compile
and run correctly, and do what you were asked to do. However, style, efficiency, readability and
formatting are also part of the evaluation criteria. In particular, if the code is so unreadable that one
cannot evaluate if it is working correctly, then you risk losing many marks for that.
PROBLEM 1: EUROPEAN OPTION PRICING WITH THE BIONOMIAL TREE
Write code to price European Put and Call Options with the binomial tree.
Create the following options in main, and compare the price obtained with a tree with 25 time steps
and the analogous result obtained by the Black Scholes formula:
Time to Expiry: 1
Volatility: 0.4
Continuously compounded risk free interest rate: 4%
Current Share Price: 100
Three strikes: 90, 100 and 110
Price Puts and Calls with the three strikes above
Next, perform a convergence study: Vary the time step in the tree over a reasonable interval and
investigate how the option price change with the time step. Compare with the Black-Scholes result.
What do you see? Describe your finding in a pdf document that you submit together with the code.
It might help to include a figure (e.g. price as a function of time step).
Instructions: The code should be as object-oriented as possible. Use classes to represent options and
also to represent the tree. The actual calculation of the option price with the tree is quite easy. If
classes are still difficult for you, start without classes and first just try to get the price right.
Comparing with the Black-Scholes formula should help you to see if you obtained the correct result.
We assume that the tree is constructed according to Cox, Ross and Rubinstein (CCR).
PROBLEM 2: MATRIX OPERATIONS
Write code to represent matrices and perform basic operations on double-valued matrices. This
should include:
- Basic arithmetic operations (addition, subtraction, matrix multiplication)
- Matrix transposition
- Printing the matrix elements to the command line
You are allowed to use functionality that we discussed (e.g. vectors) but should otherwise not use
external libraries that already represent matrices. Write the code in an object oriented way. You may
want to implement useful helper functions, such as functions to set or get elements of the matrix.
You may want to overload the operators +, - and * to implement matrix addition, subtraction and
multiplication. However, if that is too difficult, start by simply implementing functions that perform
addition, subtraction and matrix multiplication.
Make sure all operations implement appropriate checks for the size of the matrices.

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