#3: Vanguard Emerging Markets
Assets Under Management: $71.7 billion
The Vanguard Emerging Markets ETF (NYSE:VWO) is the biggest global fund out there. Previously locked into the same MSCI index as the iShares EEM fund, Vanguard is dropping that benchmark in January and instead pegging itself to the FTSE Emerging Index.
The current expense ratio is 0.2%, but part of the reason Vanguard ditched MSCI is because it is convinced it can use a benchmark that allows it to offer ETFs at even lower costs than this.