Inter-linkages between firms are a channel by which idiosyncratic shocks to one firm can affect the returns of linked counterparties. We extend a factor model of returns to allow for the transmission of idiosyncratic shocks between linked counterparties. We show that the structure of...

We formalize the idea that the financial sector can be a source of non-fundamental risk. Households' desire to hedge against price volatility can generate price volatility in equilibrium, even absent fundamental risk. Fearing that asset prices may fall, risk-averse households demand safe assets...

We explore the dynamics of default cascades in a network of credit interlinkages in which each agent is at the same time a borrower and a lender. When some counterparties of an agent default, the loss she experiences amounts to her total exposure to those counterparties. A possible conjecture in...

Among diverse social media uses covered by researchers one has thus far captured surprisingly scant attention: social media as an investment class per se. Despite the fluctuating fortunes of numerous social media initial public offerings (IPOs) and their aftermarket trading, social media stocks...

We discuss a network-based methodology that models hedge fund strategies across the superordinate-subordinate dimension to gain new insights into their interrelation. This methodology uncovers considerable misbehavior among various hedge fund strategies from the network perspective. Firstly, we...

In a financial system, the interconnectedness among entities from investing in common assets (portfolio overlaps) is considered an important channel for the propagation of systemic risk because this interconnectedness can facilitate the contagion of fire sales and lead to widespread sales as...

We study portfolio compression, a procedure that removes cycles of liabilities in a financial network. We analyze the effect of compression on social welfare and the banks' incentives to accept a compression proposal. Regarding social welfare, we show that, contrary to conventional wisdom,...

This paper shows how the combined endogenous reaction of banks and investment funds to an exogenous shock can amplify or dampen losses to the financial system compared to results from single-sector stress testing models. We build a new model of contagion propagation using a very large and...

In this paper, we present a framework for detecting distinct correlation regimes and analyzing the emerging state dependences for a multi-asset futures portfolio from 1998 to 2013. These correlation regimes have been significantly different since the financial crisis of 2008 than they were...

The idiosyncratic (microscopic) and systemic (macroscopic) components of market structure have been shown to be responsible for the departure of the optimal mean-variance allocation from the heuristic 'equally-weighted' portfolio. In this paper, we exploit clustering techniques derived from...