02505cam a22002297 4500001000600000003000500006005001700011008004100028100002800069245013700097260006600234490004100300500001700341520155700358530006101915538007201976538003602048710004202084830007602126856003702202856003602239w0959NBER20150126200819.0150126s1982 mau||||fs|||| 000 0 eng d1 ade Macedo, Jorge Braga.10aOptimal Currency Diversification for a Class of Risk Averse International Investorsh[electronic resource] /cJorge Braga de Macedo. aCambridge, Mass.bNational Bureau of Economic Researchc1982.1 aNBER working paper seriesvno. w0959 aAugust 1982.3 aIn the framework of continuous-time finance theory, this paper derives the optimal consumption and portfolio rules for an international investor with constant expenditure shares [alpha, sub j] and constant relative risk aversion [1-gamma] in a dynamic context. The index of value obtained from the consumption rule is used to obtain real returns on N different currencies in terms of their purchasing power over N goods. The portfolio rule is expressed in terms of the determinants of the purchasing powers, namely exchange rates and prices expressed in the numeraire currency. The optimal portfolio is interpreted as a capital position given by the expenditure shares and hedging zero net-worth portfolios depending on unanticipated inflation and risk aversion. It is shown that the minimum variance portfolio is independent of returns, but depends on expenditure patterns. While the speculative portfolio depends on risk aversion and real return differentials. When the effect of references on real return differentials is made explicit, it is shown that the minimum variance portfolio is affected by risk aversion. In that case, the effect of an increase in [alpha, sub i] on the portfolio proportions [x, sub i] will be positive when relative risk aversion is greater than one, as generally presumed. Actual data from eight major countries is used to compute optimal portfolios based on real return differentials for different weighting schemes, degrees of risk aversion and sample periods when exchange rates and prices are assumed to be Brownian. aHardcopy version available to institutional subscribers. aSystem requirements: Adobe [Acrobat] Reader required for PDF files. aMode of access: World Wide Web.2 aNational Bureau of Economic Research. 0aWorking Paper Series (National Bureau of Economic Research)vno. w0959.4 uhttp://www.nber.org/papers/w095941uhttp://dx.doi.org/10.3386/w0959