There are two common methods for pricing European call options on a stock with known dividends. The market practice is to use the Black-Scholes formula with the stock price reduced by the present value of the dividends. An alternative approach is to increase the strike price with the dividends compounded to expiry at the risk-free rate. These methods correspond to different stock price models a...

This study examines the relationships between stock fundamental ratios and idiosyncratic volatility from 1993 to 2010 for Australian Securities Exchange listed companies. The portfolio analysis results show that high idiosyncratic volatility companies tend to be small (measured by size), highly leveraged (measured by interest cover ratio), low profitability (measured by return on equity and ear...

We develop stock option price approximations for a model which takes both the risk of default and the stochastic volatility into account. We also let the intensity of defaults be influenced by the volatility. We show that it might be possible to infer the risk neutral default intensity from the stock option prices. Our option price approximation has a rich implied volatility surface structure a...

The aim of this paper is to investigate the properties of stochastic volatility models, and to discuss to what extent, and with regard to which models, properties of the classical exponential Brownian motion model carry over to a stochastic volatility setting. The properties of the classical model of interest include the fact that the discounted stock price is positive for all t but converges t...

How important are oil price fluctuations and oil price volatility on equity market performance? What are the policy implications if volatility turns out to be significant? We assess this issue in an economics/finance nexus for Korea using a VEC model including interest rates, economic activity, real stock returns, real oil prices and oil price volatility. Results indicate the dominance of oil p...

the main purpose of this study, is surveying the factors that affect price impact of block trades in the stock market. for this reason, the sample consisted of 525 block trades have been selected randomly of accepted companies in tehran stock exchange, that have block trade during the period 1390 to 1392. in this paper, total, temporary and permanent price impact is used as dependent variables,...

We estimate the probability of informed trading (Pi) in an order-driven stock market and perform a comprehensive analysis on the interrelations among Pi and three common performance indicators: liquidity, volatility, and efficiency. We find that uninformed traders exhibit price chasing behavior, and price volatility attracts uninformed traders. Using 3SLS which considers the endogeneity of Pi a...

We study the valuation of the variance swaps under stochastic volatility with delay and jumps. In our model, the volatility of the underlying stock price process not only incorporates jumps, which are found to be active empirically, but also exhibits past dependence: the behavior of a stock price right after a given time t depends not only on the situation at t but also on the whole past histor...