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How does the US Estate Tax affect an Australian with investments domiciled in the US?
I don't think the location of the funds is any of your concern. You're buying a CDI, which is: Australian financial instruments The US has no jurisdiction over you, being you an Australian, so unless you own a US-based asset (i.e.: a real-estate in the US, or a US brokerage account), US tax laws shouldn't matter to you.