Simulation of conditional expectations under fast mean-reverting stochastic volatility models

  title={Simulation of conditional expectations under fast mean-reverting stochastic volatility models},
  author={Andrei Cozma and Christoph Reisinger},
In this short paper, we study the simulation of a large system of stochastic processes subject to a common driving noise and fast mean-reverting stochastic volatilities. This model may be used to describe the firm values of a large pool of financial entities. We then seek an efficient estimator for the probability of a default, indicated by a firm value below a certain threshold, conditional on common factors. We first analyse the convergence of the Euler--Maruyama scheme applied to the fast… 

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