The document discusses the concept of "carry trade", which involves borrowing in a market with lower interest rates and investing in a market with higher interest rates to gain from the interest rate differential. However, carry trade also exposes investors to currency risk if exchange rates between the two currencies fluctuate during the investment period. An example is provided where an investor borrows $100 at 2% interest in the US and invests the equivalent in Indian rupees at 7% interest, but could lose money if the rupee weakens against the dollar. The document emphasizes that both gains and losses from carry trade can be magnified by currency movements.