Vanguard MSCI Emerging Markets (NYSEArca: VWO) is the largest developing economy ETF with $59.7 billion in assets, according to Morningstar. VWO has an expense ratio of 0.20%, making it considerably cheaper than EEM, which charges 0.67%. Both ETFs track the same MSCI index, at least for now.
Vanguard plans to transition VWO to a new index managed by FTSE. [Vanguard Index Switch Sets Emerging Market ETF Showdown]
BlackRock (NYSE: BLK) recently launched iShares Core MSCI Emerging Markets ETF (NYSEArca: IEMG), which has an expense ratio of 0.18%. [Vanguard Emerging Market ETF to Drop South Korea]
Dave Nadig at IndexUniverse notes that VWO and several other Vanguard ETFs will transition to new benchmarks this year.
iShares MSCI Emerging Markets Index Fund
Full disclosure: Tom Lydon’s clients own EEM and SPY.