Carry trading can be profitable provided the trader’s prediction matches, and the interest rate of the quote currency remains viable. Interest rate is one of the biggest factors that can affect carry trading. Carry trading involves the trader investing in a high-yielding currency (the quotation currency, which serves as the pair's benchmark) with funds from a lower-yielding currency (the base currency). Carry trading is lucrative over time as long as the increased interest on the quote currency is not offset by a greater depreciation of the base currency than the interest amount. To execute successful swing trading / carry trade, a thorough understanding of interest rate changes is required, including what can affect what and how predictable the interest rate shift is.