IEMG tracks the MSCI Emerging Markets IMI Index, which covers large, mid and small-cap companies in emerging markets. China, India, Taiwan and South Korea make up most of the weight, and the largest holdings include large semiconductor, internet and financial companies. Emerging markets offer exposure to faster-growing economies but also carry risks from politics, regulation, currency volatility and capital controls. IEMG is similar to VWO and to EEM, but it includes small caps and has a lower expense ratio than EEM.