Why zero-fee ETFs are not risk free By: CNBC.com News March 09, 2019 at 13:36 PM EST Morningstar's Ben Johnson and Dave Nadig of ETF.com break down the ins and outs and hidden costs of zero-fee ETFs. Read More >> Related Stocks: NVIDIA Corp SPDR S&P 500 ETF Trust Stratasys Ltd Tesla, Inc.