We introduce a generic model of a multi-asset financial market, which takes into account the impact of portfolio investment on price dynamics. This captures the fact that financial correlation determine the optimal portfolio but are affected by investment based on it. We show that, under very...

The presence of excess covariance in financial price returns is an accepted empirical fact: the price dynamics of financial assets tend to be more correlated than their fundamentals would justify. We advance an explanation of this fact based on an intertemporal equilibrium multi-assets model of...

The breakdown of short-term funding markets was a key feature of the global financial crisis of 2007/2008. Drawing on ideas from global games and network growth, we show how network topology interacts with the funding structure of financial institutions to determine system-wide crises. Bad news...