Modeling and Pricing of Covariance and Correlation Swaps for Financial   Markets with Semi-Markov Volatilities
  In this paper, we model financial markets with semi-Markov volatilities and price covarinace and correlation swaps for this markets. Numerical evaluations of vari- nace, volatility, covarinace and correlations swaps with semi-Markov volatility are presented as well. The novelty of the paper lies in pricing of volatility swaps in closed form, and pricing of covariance and correlation swaps in a market with two risky assets. 
Giovanni Salvi and Anatoliy V. Swishchuk
q-fin.PR