Monte Carlo sampling given a Characteristic Function: Quantile Mechanics in Momentum Space

Details Monte Carlo sampling given a Characteristic Function: Quantile Mechanics in Momentum Space Monte Carlo sampling given a Characteristic Function: Quantile Mechanics in Momentum Space

2009-03-09

arxiv.org/abs/0903.1592v1

Economy

Quantitative Finance

Computational Finance

Version 1

Scientific paper

In mathematical finance and other applications of stochastic processes, it is frequently the case that the characteristic function may be known but explicit forms for density functions are not available. The simulation of any distribution is greatly facilitated by a knowledge of the quantile function, by which uniformly distributed samples may be converted to samples of the given distribution. This article analyzes the calculation of a quantile function direct from the characteristic function of a probability distribution, without explicit knowledge of the density. We form a non-linear integro-differential equation that despite its complexity admits an iterative solution for the power series of the quantile about the median. We give some examples including tail models and show how to generate C-code for examples.

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