The iShares S&P Global 100 ( IOO) fund stands out in several respects as the most diversified of the group, despite its somewhat diminutive number of holdings. With its heaviest sector of "finance" representing only 16.76% of its holdings -- the lowest top sector among the funds on the list -- the Global 100 is the least concentrated and, therefore, the most sector-diversified of the group. Its relatively even sector-distribution level is confirmed by its extremely low 4.04% standard deviation of sector percentages. As the group's only "global" fund investing internationally as well as domestically, it easily qualifies as at the most geographically diversified fund on the list. The Global 100's 19.90% total return for 2006 was the second highest on the list.