The economy is primarily analyzed using the Gross Domestic Product (GDP) and employment levels. The GDP is a measure of all the goods and services produced in an economy. Economic growth is when the current and future periods of time are experiencing an expansion in GDP. As businesses increase their sales and are more confident about future activity, they hire more people. The new hires are more confident about their future and spend a portion of their income on business and the cycle continues. The stock market usually leads an economic recovery, because stock investors look to the future. If investors foresee an economic recovery 12 months from now, they will start to accumulate shares in companies that will benefit.