The ZEW Indicator of Economic Sentiment is a survey-based index that measures the current and future expectations of financial market experts regarding the German economy. It is produced by the Center for European Economic Research (ZEW) in Mannheim, Germany.The ZEW Indicator of Economic Sentiment is based on a monthly survey of around 300 German financial market experts, who are asked to assess the current economic situation and their expectations for the next six months. The answers are then used to calculate the index, which ranges from -100 to 100. A value above zero indicates positive sentiment, while a value below zero indicates negative sentiment.The ZEW Indicator of Economic Sentiment is considered to be an important indicator of the economic sentiment in Germany, and is closely watched by economists, investors, and policymakers. A positive value of the index is generally seen as a positive signal for the German economy, while a negative value can indicate concerns about the economic outlook.