Monetary policy does not suffice to determine the stochastic path of inflation. A "nominal equivalent martingale measure", associated with nominal asset prices, and the initial price level characterize the indeterminacy of monetary equilibria under uncertainty; when prices are flexible, the "nominal equivalent martingale measure" determines the distribution of rates of inflation up to the first moment. Monetary policy sets interest rates or money supplies; fiscal policy is Ricardian or non-Ricardian; asset markets are complete or incomplete;in commodity markets, competition may be imperfect and prices sticky; the asset market opens before or after the commodity market at each date-event. Recursive equilibria under interest rate policy are, also, indeterminate. Indeterminacy, here, does not derive from the stability of a deterministic steady state. Determinacy of the real allocation requires that the asset market be complete, monetary policy set interest rates, prices be flexible and the exchange of assets precede the exchange of commodities.