LBill on the Bogleheads board made this statement as part of his response to a question requesting help in selecting a diversified TIAA-CREF portfolio for a young teacher:

"Maximum diversification can be obtained with Global, Real Estate, Inflation Linked bond, and Guaranteed." (Guaranteed was explained to mean Traditional)

http://www.bogleheads.org/forum/viewtopic.php?t=20704&mrr=1216280559

I'd be interested in thoughts on this statement. 

Thanks,
Mike