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Python for Finance

Python for Finance

3.5 (33)
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Python for Finance

Python for Finance

3.5 (33)

Overview of this book

This book uses Python as its computational tool. Since Python is free, any school or organization can download and use it. This book is organized according to various finance subjects. In other words, the first edition focuses more on Python, while the second edition is truly trying to apply Python to finance. The book starts by explaining topics exclusively related to Python. Then we deal with critical parts of Python, explaining concepts such as time value of money stock and bond evaluations, capital asset pricing model, multi-factor models, time series analysis, portfolio theory, options and futures. This book will help us to learn or review the basics of quantitative finance and apply Python to solve various problems, such as estimating IBM’s market risk, running a Fama-French 3-factor, 5-factor, or Fama-French-Carhart 4 factor model, estimating the VaR of a 5-stock portfolio, estimating the optimal portfolio, and constructing the efficient frontier for a 20-stock portfolio with real-world stock, and with Monte Carlo Simulation. Later, we will also learn how to replicate the famous Black-Scholes-Merton option model and how to price exotic options such as the average price call option.
Table of Contents (17 chapters)
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16
Index

Introduction to VaR

Up to now, we have several ways to evaluate risk for an individual stock or a portfolio, such as variance, standard deviation of returns to measure the total risk, or beta to measure the market risk of a portfolio or individual stocks. On the other hand, many CEOs prefer a simple measure called Value at Risk (VaR), which has the simple definition given here:

"The maximum loss with a confidence level over a predetermined period."

From the preceding definition, it has three explicit factors plus one implied one. The implied factor or variable is our current position, or the value of our current portfolio or individual stock(s). The preceding statement offers the maximum possible loss in the future and this is the first factor. The second one is over a specific time period. Those two factors are quite common. However, the last factor is quite unique: with a confidence level or probability. Here are a few examples:

  • Example #1: On February 7, 2017, we own 300 shares...

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