Robinhood is a free-trading app that lets investors trade financial assets without paying commissions or fees. When I started to trade during my college days, E*Trade charged me 19.95 per day. When I heard about Robinhood, I couldn't believe Robinhood's zero-fee business model. How does Robinhood's zero-fee business model impact online brokerage firms? If Robinhood charges no fees, how does Robinhood make money? How do you think about this zero-fee trading model? Do you think it's a good or bad thing for investors? Why?