We propose a new framework to value employee stock options (ESOs) that captures multiple exercises of different quantities over time. We also model the ESO holder's job termination risk and incorporate its impact on the payoffs of both vested and unvested ESOs. Numerical methods based on Fourier...

We examine the ex-ante optimality of repricing of executive stock options while considering the tax effects of new accounting rules associated with traditional repricing. Although there has been a body of empirical literature on repricing, the optimality of repricing after considering the...

As of February 28, 2006, 958 publicly held companies accelerated the vesting of some or all of their employee stock options in advance of adopting SFAS 123 (R). We examine both the market reaction to these accelerations, as well as the determinants of the decision. Investors, in general, react...

Employee stock option schemes have become increasingly prevalent over the past decade or so. This situation may, or may not, change due to recent accounting regulation that demands that stock options be expensed - quite simply because expensing reduces earnings. This must impact on the incentive...

We examine whether and how firm characteristics, including firm size and liquidity and the implementation of a new share-based compensation recognition rule affect the relation between the employee stock option (ESO) grants (as proxied by the disclosed ESO expenses) and firm value. Prior studies...

Today there are many equity derivatives that are traded on organized and over-the-counter markets. The models that allow market participants to value them and manage the associated risks on a daily basis are numerous. The idea of this study is, for vanilla equity options, to understand the Black...

There is a close link between prices of equity options and the probability of default of a firm. We show that in the presence of positive expected equity recovery, the standard methods that assume zero equity recovery at default misestimate the probability of default implicit in option prices....

The Securities and Exchange Commission's 2008 emergency order introduced a shorting ban of some 800 financials traded in the US. This paper provides an empirical analysis of the options market around the ban period. Using transaction level data from OPRA (The Options Price Reporting Authority),...

Attempted dynamic replication based valuation of equity options is analyzed using the Optimal Hedge Monte-Carlo (OHMC) method. Detailed here are (1) the option hedging strategy and its costs; (2) irreducible hedging errors associated with realistically fat-tailed & asymmetric return...

This note describes the various techniques used to protect the writer of an equity option against the risk of dividend uncertainty. We first explicitly formulate the PnL tracking error in presence of dividend misspecification. We then describe various ways to offset the dividend risk: for...