Currency risk arises from changes in currency exchange rates that can impact investment gains and losses. There are three main types of currency risk:
1. Transaction exposure is the risk from commercial transactions denominated in foreign currencies. It can be hedged using forwards, futures, options, and money market hedges.
2. Translation exposure is the risk from fluctuating exchange rates when consolidating foreign subsidiary financial statements. It does not involve real cash flows.
3. Economic exposure is the risk that currency changes impact the net present value of future cash flows. It is the most significant risk to a company's long-term viability and requires strategic planning to optimize positions amid changing economic conditions.