Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

What low-fee & liquid exchange-traded index funds / ETFs should I consider holding in a retirement portfolio?
I use the following allocation in my retirement portfolio: I prefer these because: Expense Ratios Oh, and by their very definition, ETFs are very liquid. EDIT: The remaining 10% is the speculative portion of my portfolio. Currently, I own shares in HAP (as a hedge against rising commodity prices) and TIP (as a hedge against hyperinflation).