Prospect theory (PT) has long been linked with the disposition effect. Despite significant progress towards rigorously modeling the trading behavior of PT investors, the literature has been largely silent on the effect of probability weighting. In this paper we incorporate probability weighting...

More than half of S&P 500 CEOs receive options annually, however extant valuation models have not accounted for portfolio considerations. We show the inability of executives to diversify means portfolio effects matter: exercise thresholds and shareholder costs are lower than for stand-alone...

We propose an extension to the concept of the disposition effect by allowing the use of alternative reference points. While the traditional definition is based on classifying stocks as winners and losers solely based on the purchase price, we incorporate stock prices closer to sell date into the...

We consider the optimal exercise of a portfolio of American call options in an incomplete market. Options are written on a single underlying asset but may have different characteristics of strikes, maturities and vesting dates.Our motivation is to model the decision faced by an employee who is...