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Be Thankful for High-Frequency Trading

Despite the criticisms, high-frequency traders make the market more efficient, allowing for the viability of vehicles such as ETFs, says Morningstar's Sam Lee.

Jeremy Glaser: For Morningstar, I'm Jeremy Glaser. High-frequency trading has been a hot topic of conversation recently, but should investors really care that much about it? I'm here today with Sam Lee, editor of Morningstar ETFInvestor, to see what the impact is.