TRADING MULTIPLE MEAN REVERSION

How should one construct a portfolio from multiple mean-reverting assets? Should one add an asset to a portfolio even if the asset has zero mean reversion? We consider a position management problem for an agent trading multiple mean-reverting assets. We solve an optimal control problem for an agent with power utility, and present an explicit solution for several important special cases and a semi-explicit solution for the general case. The near-explicit nature of the solution allows us to study the effects of parameter misspecification, and derive a number of properties of the optimal solution.