iShares Global 100 ETF (NYSEARCA:IOO – Get Free Report) saw a large increase in short interest during the month of January. iShares Global 100 ETF Stock Down 1.0%Shares of IOO stock traded down $1.28 during trading hours on Thursday, reaching $128.51. Get iShares Global 100 ETF alerts:Institutional Trading of iShares Global 100 ETFSeveral institutional investors and hedge funds have recently made changes to their positions in the business. About iShares Global 100 ETFiShares Global 100 ETF (the Fund), formerly iShares S&P Global 100 Index Fund, is an exchange-traded fund (ETF). Read MoreReceive News & Ratings for iShares Global 100 ETF Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for iShares Global 100 ETF and related companies with MarketBeat.com's FREE daily email newsletter.