Mit vorliegender Arbeit wird versucht, die Validit?t des Black/Scholes- und des Barone-Adesi/Whaley-Optionsbewertungsmodells, bezogen auf ein breites Spektrum der in Deutschland b?rsennotierten Optionsscheine auf den wichtigsten nationalen Aktienindex, den Deutschen Aktienindex DAX, theoretisch...

The inaccuracy of the Black-Scholes formula arises from two aspects: the formula is for European options while most real option contracts are American; the formula is based on the assumption that underlying asset prices follow a lognormal distribution while in the real world asset prices cannot...

We consider the problem of efficient estimation of tail probabilities of sums of correlated lognormals via simulation. This problem is motivated by the tail analysis of portfolios of assets driven by correlated Black-Scholes models. We propose two estimators that can be rigorously shown to be...

Three years after the seminal work of Black and Scholes on the pricing of European options, Scholes presented a paper in which the impact of taxation on the value of an option is analyzed. We restart this discussion in a simple binomial setting emphasizing the economic principles of replicating...

The main goal of this dissertation was to obtain an understanding as to the true economic nature of employee share options and the problems surrounding the accounting thereof.The main conclusion of this study is that employee share options should be expensed in the income statement as and when...

Popular ways of hedging downside risk of a stock portfolio is by means of a constant proportion portfolio insurance (CPPI) strategy or by means of an options-based portfolio insurance strategy (OBPI). However both have drawbacks in terms of practical applicability given transaction costs....