We propose a long-run risk model with stochastic volatility, a time-varying mean reversion level of volatility, and jumps in the state variables. The special feature of our model is that the jump intensity is not affine in the conditional variance but driven by a separate process. We show that...

Directed links in cash flow networks affect the cross-section of price exposures and market prices of risk in equilibrium. In an asset pricing model featuring mutually exciting jumps, we measure directedness through an asset's shock propagation capacity (spc). In the model, we prove: (i) Cash...

Stocks are exposed to the risk of sudden downward jumps. Additionally, a crash in one stock (or index) can increase the risk of crashes in other stocks (or indices). Our paper explicitly takes this contagion risk into account and studies its impact on the portfolio decision of a CRRA investor...

Our study is the first to investigate the implications of trading in options that expire on the same day - so-called "0DTE" options. Almost the entire growth of trading in S&P 500 index options can be traced back to demand for 0DTE options. We use recent exchange-related developments to identify...

In this paper we study the equilibrium in a heterogeneous economy with two groups of investors. Over-confident experts incorrectly assume that their signal for the drift of the dividend process is correlated with the true drift, but interpret the signal otherwise perfectly. Rational laymen avoid...

Variance contracts permit the trading of 'variance risk', i.e. the risk that the (squared) volatility of stock returns changes randomly over time. We discuss why investors might want to trade this type of risk, and why they might prefer a variance contract to standard calls and puts for this...

The vast majority of approaches to risk management, hedging, or portfolio planning assume that some model is given. However, under model risk, the true data generating process is not known. The focus of this paper is on problems related to the hedging of derivative contracts. We explain the main...

This paper provides an in-depth analysis of the properties of popular tests for the existence and the sign of the market price of volatility risk. These tests are frequently based on the fact that for some option pricing models under continuous hedging the sign of the market price of volatility...

This paper provides a theoretical and numerical analysis of robust hedging strategies in a diffusion-type setup including stochastic volatility models. A hedging strategy is called robust if the hedger achieves an overprotection whenever the realised volatility stays within a given interval. We...

This paper analyses two implied methods to determine the pricing function for derivatives when the market is incomplete. First, we consider the choice of an equivalent martingale measure with minimal cross-entropy relative to a given benchmark measure. We show that the choice of the numerative...