Christine Lagarde: Climate, nature and monetary policy

What the desk is arguing

Lagarde's remarks at the Climate, Nature and Monetary Policy Conference reinforce the ECB's view that climate change has become a core mandate for monetary policy, not a side project. The speech ties nature degradation to inflation and financial stability, arguing that central banks must account for ecosystem risks in their models. This aligns with the ECB's ongoing strategy review and its push for 'green quantitative tightening' via collateral haircuts on high-carbon assets.

The thesis is that ignoring climate costs will create larger output gaps and more persistent inflation volatility, forcing the ECB to maintain a cautious policy stance even as headline inflation falls. The evidence cited includes the increasing frequency of supply shocks tied to extreme weather and biodiversity loss. By anchoring expectations around these risks, Lagarde implicitly justifies a slower normalization path than the Fed.

The counterfactual the desk is rejecting is the view that climate risks are too long-term and uncertain to factor into short-term monetary decisions. Lagarde argues that waiting for perfect data would be more damaging to credibility than acting on incomplete information now.