Showing 1 - 10 of 15,803
volatility smiles. The empirical results provide strong evidence that time-varying volatility, leptokurtosis and skewness are … models generalizes the traditional Black-Scholes framework by accommodating time-varying conditional volatility, skewness and …
Persistent link: https://www.econbiz.de/10005149038
is conducted implicitly, via observed option prices. A range of models which allow for conditional leptokurtosis …, skewness and time-varying volatility in returns, are considered, with posterior parameter distributions and model probabilities …
Persistent link: https://www.econbiz.de/10005427634
Suppose a fund manager uses predictors in changing port-folio allocations over time. How does predictability translate into portfolio decisions? To answer this question we derive a new model within the Bayesian framework, where managers are assumed to modulate the systematic risk in part by...
Persistent link: https://www.econbiz.de/10011604927
The valuation of options and many other derivative instruments requires an estimation of exante or forward looking volatility. This paper adopts a Bayesian approach to estimate stock price volatility. We find evidence that overall Bayesian volatility estimates more closely approximate the...
Persistent link: https://www.econbiz.de/10011843228
A State Price Density (SPD) is the density function of a risk neutral equivalent martingale measure for option pricing, and is indispensible for exotic option pricing and portfolio risk management. Many approaches have been proposed in the last two decades to calibrate a SPD using financial...
Persistent link: https://www.econbiz.de/10010319199
While stochastic volatility models improve on the option pricing error when compared to theBlack-Scholes-Merton model, mispricings remain. This paper uses mixed normalheteroskedasticity models to price options. Our model allows for significant negative skewnessand time varying higher order...
Persistent link: https://www.econbiz.de/10005868652
The valuation of options and many other derivative instruments requires an estimation of exante or forward looking volatility. This paper adopts a Bayesian approach to estimate stock price volatility. We find evidence that overall Bayesian volatility estimates more closely approximate the...
Persistent link: https://www.econbiz.de/10011555938
, and allow for substantial negative skewness and time varying higher order moments of the risk neutral distribution. When …
Persistent link: https://www.econbiz.de/10013137811
Option market prices have often been regarded as a window on investor sentiment about the future price behavior of the underlying asset. Such prices can be very different from model prices and have long been noted by implied volatility plots revealing “smiles” or “smirks”. In this paper...
Persistent link: https://www.econbiz.de/10013116037
Using a Bayesian time‐varying beta model, we explore how the systematic risk exposures of hedge funds vary over time conditional on some exogenous variables that managers are assumed to use in changing their trading strategies. In such a setting, we impose a structure on fund returns, betas...
Persistent link: https://www.econbiz.de/10013116243