Theory of Financial Risk: Basic notions in probability

Details Theory of Financial Risk: Basic notions in probability Theory of Financial Risk: Basic notions in probability

1999-05-27

arxiv.org/abs/cond-mat/9905413v1

Physics

Condensed Matter

50 pages, LaTeX + 10 EPS figures

Scientific paper

Risk control has become one of the major concern of financial institutions. The need for adequate statistical tools to measure and anticipate the amplitude of the potential moves of financial markets is clearly expressed, in particular for derivative markets. Classical theories, however, are based on simplified assumptions -- such as Gaussian statistics -- and lead to a systematic (and sometimes dramatic) underestimation of real risks. We summarize a few basic notions in probability theory which are useful in a financial context: Statistics of Extremes, Sums of Random Variables, Central Limit Theorems and Deviations, Correlations and Dependence, and a brief introduction to Random Matrix Theory. This self-contained text corresponds to the first chapter of our book, `Theory of Financial Risk'.

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