We extend the Schumpeter meeting Keynes (K+S) agent-based model by introducing an evolving interbank network in the money market. Banks are exposed to counterparty risk and evaluate interbank positions using a network valuation (NEVA) clearing mechanism, which ensures systemic risk minimization with minimal assumptions on banks’ behavior. The model can replicate several stylized facts about the topology of the interbank network and the dynamics of banks’ balance sheets. The model encompasses financial contagion and systemic risk, allowing us to study the interactions between micro- and macro-prudential policies. Our results suggest that the introduction of a micro-prudential regulation also accounting for the network structure can reduce the incidence of systemic risk events. We also find that, in presence of a two-pillar regulatory framework – grounded on a Basel III macro-prudential regulation and a NEVA-based micro-prudential one –, there is no trade-off between financial stability and macroeconomic performance. This points towards the possibility of designing a regulatory framework able to achieve financial stability without overly stringent capital requirements.

Which policies can increase the resilience of the financial system to climate risks? Recent evidence on the significant impacts of climate change and natural disasters on firms, banks and other financial institutions call for a prompt policy response. In this paper, we employ a macro-financial agent-based model to study the interaction between climate change, credit and economic dynamics and test a mix of policy interventions. We first show that financial constraints exacerbate the impact of climate shocks on the economy while, at the same time, climate damages to firms make the banking sector more prone to crises. We find that credit provision can both increase firms’ productivity and their financial fragility, with such a trade-off being exacerbated by the effects of climate change. We then test a set of “green” finance policies addressing these risks, while fostering climate change mitigation: i) green Basel-type capital requirements, ii) green public guarantees to credit, and iii) carbon-risk adjustment in credit ratings. All the policies reduce carbon emissions and the resulting climate impacts, though moderately. However, their effects on financial and real dynamics is not straightforwardly positive. Some combinations of policies fuel credit booms, exacerbating financial instability and increasing public debt. We show that the combination of the three policies leads to a virtuous cycle of (mild) emission reductions, stable financial sector and high economic growth. Additional tools would be needed to fully adapt to climate change. Hence, our results point to the need to complement financial policies cooling down climate-related risks with mitigation policies curbing emissions from real economic activities.