Resumen
The 21st Century has seen important innovations in stock markets, particularly the widespread adoption of automatic trading systems, which, allied to high-speed information systems, have increased efficiency and competition among stock brokers. In this context, we investigate the impacts of these changes on independent Brazilian brokerage firms. Results based on a 52-month sample period suggest a small effect of the Bovespa index, market volatility and traded volumeon brokers firms financial performance, indicating a still-limited impact of new technologies of automatic trading and high-speed information on the Brazilian market.