I work for a private university in So. California that uses TIAA-CREF for retirement investments. I just found out that the index fund for TIAA-CREF is based upon the Russel200 rather than the S&P500. Based upon my "foolish" reading, the S&P500 index is the way to go. I don't want to leave my plan because the university matches my contribution up to 8%. Am I a bit stuck here, or do I have other options that are better? Is the Russel2000 index worse than the S&P 500?