Suppose an investor is faced with two assets with stochastic rates of return such that in an either-or choice situation the investor can express a preference over the marginal probability distributions of the rates of returns of the assets. If the investor is able to form a portfolio containing...

Initially an investor has the choice of two risky assets, writing a European put option or buying the underlying share. Under broad conditions a risk averse investor will be subjectively better off writing the put. When homogeneous expectations are invoked, an upper bound for the put premium is...