Effective interest rate takes compounding into account to show the actual return on an investment over time. It is calculated using the stated annual interest rate and compounding period. For example, a 10% annual interest savings account compounded monthly earns an effective 10.471% annually.
A forward exchange contract is an agreement to buy a set amount of foreign currency at a predetermined future exchange rate. The forward rate can be calculated using the current spot rate, domestic interest rate, foreign interest rate, and the number of days until settlement. For example, a 3-month USD/CAD contract rate would be 1.3138 using given spot and interest rates.