Maskawa, Jun-ichi - In: Physica A: Statistical Mechanics and its Applications 324 (2003) 1, pp. 317-322
We study a multivariate Markov chain model as a stochastic model of the price changes of portfolios in the framework of the mean field approximation. The time series of price changes are coded into the sequences of up and down spins according to their signs. We start with the discussion for...