Germany (4th largest economy, Europe's engine) produces two key sentiment indicators that move the DAX, Euro Stoxx 50, and EUR/USD. (1) IFO Business Climate Index — surveys 9,000+ German companies on current conditions and 6-month outlook. The 'Expectations' component is more forward-looking and market-moving. A drop below 85 signals recession risk for the eurozone. DAX typically moves 0.5-1.5% on significant beats/misses. (2) ZEW Economic Sentiment — surveys 350+ financial professionals on their 6-month outlook. More volatile than IFO but leads economic turning points by 4-6 months. Divergence between ZEW (forward-looking) and IFO Current Conditions (backward-looking) signals inflection points. (3) German factory orders and industrial production confirm or contradict survey signals. (4) As the eurozone's largest economy, weak German data increases ECB rate cut expectations → Euro weakens, Euro Stoxx rallies. Germany's deep integration in global supply chains (automotive, chemicals, machinery) means weak data also signals slowing Chinese demand.