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Prepare your modelling report with related tables, figures, interpretations, and explanations based on the following tasks (please submit in PDF format):
- Get access to Yahoo Finance and download five-year historical daily prices of a stock or stock index.
- Divide the sample into two sub-samples: in sample for model estimation, and out-of-sample for forecasting. The length of the out-of-sample is two weeks (10 trading days)
- Calculate the logarithm returns for the stock. Analyse the stock return characteristics, including, return distribution, serial correlation, and volatility clustering for the in-sample period. (20 marks)
- Based on analyses in step 3, build an appropriate GARCH model for the return volatility using the in-sample period and explain why the model specification is appropriate. (Note that: you may not need to capture the serial correlation of the return level using ARMA model, but if you do so, you can earn the reward mark of 5 marks). (20 marks)
- Fix the model specification you found in Step 4, fix the size of the in-sample period as the window size, using 1-step (day) rolling window method to re-estimate the model, make 1-step ahead forecasts of the volatilities, and calculate the 99% Value-at-Risk for the out-of-sample period. (30 marks)
- Graph the calculated 99% Value-at-Risk and the observed returns in one figure, calculate the hits rate (hits =1 if a daily observed return is greater than the calculated 99% Value-at-Risk ∑𝑁 h𝑖𝑡𝑠
and hits =0 otherwise; and h𝑖𝑡𝑠 𝑟𝑎𝑡𝑒 = 𝑡=1 ) and comment about the accuracy of the 𝑁 model. (20 marks) - Provide suggestions that can improve the model (Note: you do not need to perform these suggestions. Instead, you only need to discuss about the suggestions and their rationale). (10 marks)
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