The Index of Leading Economic Indicators, or LEI, is a economic metric that helps forecast future economic activity. There are a variety of synonyms that can be used to describe the LEI, including economic barometer, business cycle indicator, and forward-looking metric. These terms all refer to the same basic concept - a statistical measure that incorporates several economic indicators to provide insight into future economic trends. Other synonyms for the LEI may include growth indicator, predictor of economic activity, or economic predictor. Whatever term is used, the purpose of the metric remains the same - to help businesses, investors, and policymakers forecast economic conditions and make informed decisions.