SSRN Author: Jessica A. WachterJessica A. Wachter SSRN Content
http://www.ssrn.com/author=159310
http://www.ssrn.com/rss/en-usFri, 02 Dec 2016 04:31:39 GMTeditor@ssrn.com (Editor)Fri, 02 Dec 2016 04:31:39 GMTwebmaster@ssrn.com (WebMaster)SSRN RSS Generator 1.0REVISION: Option Prices in a Model with Stochastic Disaster RiskContrary to well-known asset pricing models, volatilities implied by equity index options exceed realized stock market volatility and exhibit a pattern known as the volatility skew. We explain both facts using a model that can also account for the mean and volatility of equity returns. Our model assumes a small risk of economic disaster that is calibrated based on international data on large consumption declines. We allow the disaster probability to be stochastic, which turns out to be crucial to the model's ability both to match equity volatility and to reconcile option prices with macroeconomic data on disasters.
http://www.ssrn.com/abstract=2555700
http://www.ssrn.com/1540870.htmlThu, 03 Nov 2016 05:40:55 GMTREVISION: Maximum Likelihood Estimation of the Equity PremiumThe equity premium, namely the expected return on the aggregate stock market less the government bill rate, is of central importance to the portfolio allocation of individuals, to the investment decisions of firms, and to model calibration and testing. This quantity is usually estimated from the sample average excess return. We propose an alternative estimator, based on maximum likelihood, that takes into account information contained in dividends and prices. Applied to the postwar sample, our method leads to an economically significant reduction from 6.4% to 5.1%. Simulation results show that our method produces more reliable estimates under a wide range of specifications.
http://www.ssrn.com/abstract=2443529
http://www.ssrn.com/1532878.htmlTue, 04 Oct 2016 07:30:05 GMTREVISION: Option Prices in a Model with Stochastic Disaster RiskContrary to well-known asset pricing models, volatilities implied by equity index options exceed realized stock market volatility and exhibit a pattern known as the volatility skew. We explain both facts using a model that can also account for the mean and volatility of equity returns. Our model assumes a small risk of economic disaster that is calibrated based on international data on large consumption declines. We allow the disaster probability to be stochastic, which turns out to be crucial to the model's ability both to match equity volatility and to reconcile option prices with macroeconomic data on disasters.
http://www.ssrn.com/abstract=2555700
http://www.ssrn.com/1532446.htmlSun, 02 Oct 2016 06:35:23 GMTREVISION: Risk, Unemployment, and the Stock Market: A Rare-Event-Based Explanation of Labor Market VolatilityWhat is the driving force behind the cyclical behavior of unemployment and vacancies? What is the relation between job-creation incentives of firms and stock market valuations? We answer these questions in a model with time-varying risk, modeled as a small and variable probability of an economic disaster. A high probability implies greater risk and lower future growth, lowering the incentives of firms to invest in hiring. During periods of high risk, stock market valuations are low and unemployment rises. The model thus explains volatility in equity and labor markets, and the relation between the two.
http://www.ssrn.com/abstract=2541916
http://www.ssrn.com/1530123.htmlThu, 22 Sep 2016 16:13:14 GMTNew: Do Rare Events Explain CDX Tranche Spreads?We investigate whether a model with a time-varying probability of economic disaster can explain the pricing of collateralized debt obligations, both prior to and during the 2008-2009 financial crisis. Namely, we examine the pricing of tranches on the CDX, an index of credit default swaps on large investment-grade firms. CDX senior tranches are essentially deep out-of-the money put options because they do not incur losses until a large fraction of previously stable firms default. As such, these products clearly reflect the market’s assessment of rare-event risk. We find that the model can simultaneously explain prices on CDX senior tranches and on equity index options at parameter values that are consistent with the equity premium and with aggregate stock market volatility. Our results demonstrate the importance of beliefs about rare disasters for asset prices, even during periods of relative economic stability.
http://www.ssrn.com/abstract=2839966
http://www.ssrn.com/1529071.htmlMon, 19 Sep 2016 06:03:37 GMT