Interest Rates Understanding the Basics Interest rates are the cost of money when borrowed or loaned, and are used to control inflation and economic growth. But why do interest rates rise and fall, and how can they affect you? Download the Fact Sheet Related Posts:Market VolatilityProtecting you & Your FamilySavings & Budgets Related News Items article insight Market Volatility article insight Protecting you & Your Family article insight Savings & Budgets