In Germany, the ZEW Current Conditions Index measures the level of optimism that analysts have about the current economic situation. The survey covers up to 350 financial and economic analysts. The index is constructed as the difference between the percentage share of analysts that are optimistic and the percentage of analysts that are pessimistic about the economy. Therefore, the ZEW indicator measures the confidence on a scale of -100 (all analysts see deteriorating economic conditions) up to 100 (all analysts see improving economic conditions). A 0 value indicates neutrality.