IOO: A Concentrated U.S. Growth Fund In Disguise

The iShares Global 100 ETF is heavily concentrated in top US tech stocks, with 50% of its assets in its top seven holdings. IOO's recent outperformance has reversed in 2026, as high valuations and macro headwinds have led to underperformance and negative sentiment. Despite a strong three-year run, IOO now faces elevated risk from sector and geographic concentration, and its 0.40% fee is high for a passive ETF.