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How should residents of smaller economies allocate their portfolio between domestic and foreign assets?
We face the same issue here in Switzerland. My background: Institutional investment management, currency risk management. My thoughs are: Home Bias is the core concept of your quesiton. You will find many research papers on this topic. The main problems with a high home bias is that the investment universe in your small local investment market is usually geared toward your coutries large corporations. Lack of diversification: In your case: the ASX top 4 are all financials, actually banks, making up almost 25% of the index. I would expect the bond market to be similarly concentrated but I dont know. In a portfolio context, this is certainly a negative. Liquidity: A smaller economy obviously has less large corporations when compared globally (check wikipedia / List_of_public_corporations_by_market_capitalization) thereby offering lower liquidity and a smaller investment universe. Currency Risk: I like your point on not taking a stance on FX. This simplifies the task to find a hedge ratio that minimises portfolio volatility when investing internationally and dealing with currencies. For equities, you would usually find that a hedge ratio anywhere from 0-30% is effective and for bonds one that ranges from 80-100%. The reason is that in an equity portfolio, currency risk contributes less to overall volatility than in a bond portfolio. Therefore you will need to hedge less to achieve the lowest possible risk. Interestingly, from a global perspective, we find, that the AUD is a special case whereby, if you hedge the AUD you actually increase total portfolio risk. Maybe it has to do with the AUD being used in carry trades a lot, but that is a wild guess. Hedged share classes: You could buy the currency hedged shared classes of investment funds to invest globally without taking currency risks. Be careful to read exactly what and how the share class implements its currency hedging though.