# Knowledge rather than Hope

## A Book for Retail Investors and Mathematical Finance Students

This book does not tell you how to make millions. But it does tell you how to avoid typical mistakes and severe losses. It also tells you which long-term performance you can expect from a trading strategy and how to verify whether a strategy really works. In particular, the Kelly criterion (also known as fortune's formula) is comprehensively discussed with portfolio management in mind. You will also learn the basics of the statistical analysis with R. Last but not least the author frankly shares his own (sometimes bitter) trading experience.

In order to read this book you need a working knowledge of college mathematics. But the book is completely void of mathematical arrogance and complicated but impractical market models. The most of problems are solved by means of the Monte Carlo simulation, i.e. we let a computer work for us.

Keywords practical retail investment, Kelly criterion for diversifed portfolios, portfolio optimization, backtesting, statistical analysis, Monte Carlo simulation, R.

### Teaser: Contents, Preface and Chapters 1 & 2Cover in pdfR CodeErrata

Vasily Nekrasov studied Economics at the St. Petersburg State University and Quantitative Finance at the Ulm University. He worked as a software developer for banks and insurance companies and as a risk manager for the German Finance Agency (central service provider for the Federal Republic of Germany's borrowing and debt management). Currently he works as a risk analyst and model developer in energy branch.

My Wikifolio: Somewhat better than DUCKS (DUCKS = DAX :))

ISIN: DE000LS9HDK3

## Yet another, yet very reader-friendly, introduction to the measure theory

Initially, there was an ambitious plan to write a comprehensive book on quantitative finance with readable and thorough introduction to necessary advanced mathematics. It turned out to be a little bit too much ambitions.
So I decided to limit myself to the [one of the] most important part: to write a user-friendly introduction to the Lebesgue measure theory. Currently, there are many good books on financial mathematics but I do not know any book on measure theory, which I would recommend for a self-study. So I wrote my own :)

I especially appreciate the following comment, which I received: "very clear introduction to the measure theory, much better than Shreve". This comparison with maestro Shreve is particularly flattering for me, since I learnt by Shreve's textbook and it is really wonderful.

The book does not cover Lebesgue integral, nor even measurable functions (except the Chapter 4, where the main idea of function measurability is illustrated). But the fundamental ideas of the Lebesgue measure are discussed comprehensively. So after you read my notes (with pencil in hand), you will be able to read any book on Real Analysis and will easily understand Lebesgue integral and other advanced topics.

The 1st chapter is a teaser for financiers, here I quickly show that the math is valuable for financial modeling. Those, who are interested in Real Analysis only may skip it but I do recommend to have a look on it. The 2nd chapter is the most important, here I slowly and thoroughly introduce the reader to the measure theory. I start with the measure on (0,1) and then on \mathbb{R}^1 (as Lebesgue himself did). You will see, how semirings and sigma-algebras naturally arise and what advantages the Lebesgue measure has. In the 3rd chapter we discuss the abstract measure theory (now, after chapter 2, your mind is mature for this). As a bonus (and this is my own "pedagogical invention") I demonstrate that a semiring as such, without a sigma-additive measure on it, does not mean much. Additionally, I try to show an intuition behind the interplay of the measure theory and the theory of stochastic processes. Chapter 4 is incomplete but it accentuates the important but frequently omitted idea that measurable functions can do without measures...

The only nice-to-have feature which is, so far, missing is a discussion of singular measures. Singular measures are important for Levy processes. However, if you carefully read about Cantor set, singular measures will not be a problem for you.

So good luck and if you like what already done and I once come back to academia then the book is to be continued.

Chapter 1 is available online
Complete Chapter 2 is available online (some misprints corrected on 28.11.2008)
Complete Chapter 3 and LaTeX source are available online (6.12.2008)
Some stuff of Chapter 4 and LaTeX source are available online (last update: 8.01.2009)

## QuantLib notes

Notes on Getting started with QuantLib with Source code and diagramms

Wanna get a debugger-friendly version of QuantLib::Date? Donate me 10 USD :)

Implementing the HPSn term-structure model in QuantLib: a working plan

Kelly Criterion for Multivariate Portfolios: A Model-Free Approach

CUDA in Finanz- und Versicherungsbranche (Workshop mit Empulse GmbH, Cologne, 9.03.2011)

CUDA GPUs: Fast and Energy-Efficient Financial Computation (A poster for Energy and Finance 2013 Conference in Essen)

Risiken im Bereich erneuerbarer Energien und deren Risk Management (Lecture at the Colonge University of Applied Science, 18.06.2013)

An accompaniment to a course on interest rate modeling: with discussion of Black-76, Vasicek and HJM models and a gentle introduction to the multivariate LIBOR Market Model
LaTeX source

Notes on deploying Hadoop from Cloudera (14.06.2015)

Digital Ocean - Easy scalable hosting - virtual server in Cloud

Cyber Monday Woche bei Amazon