A study observed 19,646 individuals who began day trading in the Brazilian equity futures market between 2013 and 2015, finding that 97% lost money and only 0.4% earned more than a bank teller. The study concludes that it is virtually impossible for an individual to day trade for a living. The results suggest that day trading is highly unlikely to be a sustainably profitable undertaking. The study's findings are based on a specific market and time period, which may limit their generalizability.