My margin lender won't rate CHO and AUI on equal terms with ARG...

My margin lender won't rate CHO and AUI on equal terms with ARG (cos of market cap and daily turnover). But just wondering it seems (eyeballing graphs without looking closely about rights issue etc) that CHO out performs AUI and ARG? over the long term - is that right?

addit: having looked at their sites:

I only have stats on CHO from their half yearly that says 18.2% over 10yrs (to Dec 2006 including dividends).

ARG on their site says 10yrs - 16.1% (including div reinvested) to Feb 2007.

AUI - 15.5% (only have 7 yrs, div reinvested)

; could this be why AUI is below their NTA? (compared to CHO and ARG?)

Any coments - not sure if this changes my out look on which (or all three well two ARG and CHO as my margin lender doesn't have AUI) to buy.