Is exchange rate trading profitable?

We test whether exchange rate trading is profitable in the emerging markets of Brazil, China, India, and South Africa. Using momentum trading strategies applied to high frequency data, we discover that: (a) momentum-based trading strategies lead to statistically significant profits from the currencies of all four emerging markets; (b) the South African Rand is generally the most profitable, followed by the Brazilian Real and the Indian Rupee; (c) profits are persistent during the day and increase substantially from 1-minute trade to 120-minute trade; and (d) during the period of the global financial crisis currency profits were maximised.