Do you think investors should try to diversify their domestic investment portfolios by including international assets in it?

Question

Do you think investors should try to diversify their domestic investment portfolios by including international assets in it? Why/why not? What is the best way to achieve the benefits (if any) of international portfolio diversification without bearing the associated costs?     

Summary

The question belongs to Finance and it is about domestic investment portfolios. The question is about whether or not is it a good practice to diversify domestic investment portfolios by including international assets in it. The best ways to do this have been discussed in the solution.

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