We characterize the solution to the consumption and investment problem of a power utility investor in a continuous-time dynamically complete market with stochastic changes in the opportunity set. Under stochastic interest rates the investor optimally hedges against changes in the term structure...

With constrained portfolios contingent claims do not generally have a unique price that rules out arbitrage opportunities. Earlier studies have demonstrated that when there are constraints on the hedge portfolio, a no-arbitrage price interval for any contingent claim exists. I consider the more...

We analyze the optimal stock-bond portfolio under both learning and ambiguity aversion. Stock returns are predictable by an observable and an unobservable predictor, and the investor has to learn about the latter. Furthermore, the investor is ambiguity-averse and has a preference for investment...

We embed human capital as an innate, illiquid asset in Markowitz' one-period mean-variance framework. By solving the Markowitz problem for different values of the ratio of human capital to financial wealth, we emulate life-cycle effects in household portfolio decisions. The portfolio derived...

We study the consumption and investment choice of an agent in a continuous-time economy with a riskless asset, several risky financial assets, and two consumption goods, namely a perishable and a durable good with an uncertain price evolution. Assuming lognormal prices and a multiplicatively...

We study the dynamic consumption and portfolio choice of an investor who has habit formation in preferences and access to a complete financial market. For general, possibly non-Markov, dynamics of market prices, we provide an exact characterization of the optimal behavior in terms of two...

This paper derives bounds on the prices of European and American bond options, caps, floors, and European swaptions assuming only absence of arbitrage and non-negative interest rates. The bounds are considerably tighter than Merton's bounds on stock option prices, especially for options on...

The recent theoretical asset allocation literature has derived optimal dynamic investment strategies in various advanced models of asset returns. But how sensitive is investor welfare to deviations from the theoretically optimal strategy? Will unsophisticated investors do almost as well as...