We provide a micro-based rationale for macroprudential capital regulation by developing a model in which bankers can privately undertake a costly effort and reduce the probability of adverse shocks to their asset holdings that force liquidation (deterioration risk). Low fundamental risk of...

We provide a new rationale for macroprudential capital regulation by developing a model where banks can privately undertake a costly effort and reduce the probability of adverse shocks to their asset holdings and liquidation (deterioration risk). Low fundamental risk guarantees benevolent...

The initial margin requirements for a portfolio of derivatives are typically calculated using a risk model. Common risk models are procyclical: margin requirements for the same portfolio are higher in times of market stress and lower in calm markets. This procyclicality can cause liquidity...

We quantify the size of a fire-sale externality in the derivatives market in the absence of a macroprudential buffer on top of microprudential initial margin requirements. We show how this varies over the financial cycle with market volatility. We then assess the ability of a macroprudential...

The requirement to post initial margin on derivatives transactions is a key feature of the post-crisis reforms of the OTC derivatives markets. Initial margin requirements are usually determined by risk-based models. These models typically require increased margin in stressed conditions: they are...